Search: 24 results found for "hematoid quartz"

Golden Healer Hematoid Quartz Palmstone 5.2cm Palm Stone Tali & Loz Crystals

Golden Healer Hematoid Quartz Palmstone 5.2cm, India

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£9.00

Hematoid Quartz Palmstone | 6.6cm | Madagascar

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£9.00

Strawberry Quartz Tumblestones 10-20mm

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~~£6.50~~ £4.00

Hematite Stained Natural Quartz Freeform Freeform Tali & Loz Crystals

Hematite Stained Natural Quartz Freeform 12.5cm

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£35.00

Rose Quartz Rough 25-40mm

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£6.00

Hollandite In Quartz Specimen 59gr Specimen Tali & Loz Crystals

Hollandite In Quartz Specimen 59gr, Madagascar

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£75.00

Amethyst, Pink Quartz with Golden Healer & Hematite Sphere 65mm spheres Tali & Loz Crystals

Amethyst, Pink Quartz, Golden Healer & Hematite Sphere | 6.5cm | Brazil

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£95.00

Hollandite In Quartz Specimen 6gr Specimen Tali & Loz Crystals

Hollandite In Quartz Specimen 6gr, Madagascar

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£15.00

Hollandite In Quartz Specimen 54gr Specimen Tali & Loz Crystals

Hollandite In Quartz Specimen 54gr, Madagascar

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£95.00

Rutilated Smokey Quartz Point 57gr

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£24.00

Hollandite In Quartz Specimen 60gr Specimen Tali & Loz Crystals

Hollandite In Quartz Specimen 60gr, Madagascar

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£95.00

Rose Quartz Spheres 20mm

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£9.50

Hand Carved Clear Quartz | 20.5g | India

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£55.00

Rutilated Quartz Tumblestones 20-30mm

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~~£6.50~~ £4.00

Hand Carved Clear Quartz | 13.6g | India

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£55.00

OUTLET Clear Quartz with Natural Phantoms Tower 5.7cm

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~~£25.00~~ £18.00

Natural Hematite Roses With Iron & Hematite Stained Quartz Specimen Specimen Tali & Loz Crystals

Natural Hematite Roses With Iron & Hematite Stained Quartz Specimen 12cm

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£275.00

Hollandite In Quartz Specimen 5.65gr Specimen Tali & Loz Crystals

Hollandite In Quartz Specimen 5.65gr, Madagascar

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£25.00

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Hematoid Quartz: Clear Quartz That Ran Into Iron and Never Looked Back

What Is Hematoid Quartz? Mineral Group: Silicate | Category: Quartz | Formula: SiO₂ with Fe₂O₃ inclusions | Hardness: 7 (Mohs) Hematoid Quartz is a variety of Quartz characterised by the presence of Hematite or iron oxide inclusions distributed throughout the crystal structure, either as internal inclusions, surface coatings, or both. The term "hematoid" simply means Hematite-bearing, and it is these iron-rich components that give the stone its distinctive red, orange, brown, and yellow colouration. Depending on the distribution and form of the inclusions, individual specimens can range from deep brick red to warm amber tones, sometimes within the same crystal. It belongs to the macrocrystalline Quartz family, sharing the same base silicon dioxide (SiO₂) chemistry and hexagonal crystal structure as Clear Quartz, Amethyst, Citrine, and Smokey Quartz. What distinguishes Hematoid Quartz is not its host mineral but the secondary iron mineralisation that occurred during or after its formation. Hematoid Quartz is sometimes sold under alternative trade names including Fire Quartz and Ferruginous Quartz. While these names vary, they all describe the same fundamental material: Quartz coloured by iron oxide compounds. How Does It Form? Hematoid Quartz forms through the same fundamental process as other macrocrystalline Quartz varieties. Silica-rich hydrothermal fluids move through fractures and cavities in the Earth's crust, cooling slowly and depositing silicon dioxide in the form of hexagonal Quartz crystals. The growth process is gradual, unfolding over thousands to millions of years depending on local geological conditions. The iron component enters the picture in one of two ways. In some specimens, iron-rich fluids are present during the initial crystallisation phase, allowing Hematite (Fe₂O₃) or other iron oxide minerals to be incorporated directly within the growing Quartz crystal as phantom layers or dispersed inclusions. In others, iron-bearing groundwater percolates through existing Quartz crystals after their formation, depositing a thin coating or staining of iron oxide along internal fractures and on crystal surfaces. The timing and chemistry of this iron introduction determines whether the resulting colouration is internal and three-dimensional or surface-bound and coating-like. Hematoid Quartz is found in a number of iron-rich geological environments worldwide. Notable sources include Brazil, Madagascar, Morocco, South Africa, and the United States. Key Physical Properties at a Glance Property Detail Chemical Formula SiO₂ with Fe₂O₃ (Hematite inclusions) Crystal System Hexagonal (Trigonal subdivision) Hardness 7 (Mohs) Specific Gravity 2.65 Refractive Index 1.544 – 1.553 Birefringence 0.009 Pleochroism Weak Lustre Vitreous (glassy) Fracture Conchoidal Cleavage None Colour Cause Hematite and iron oxide inclusions (Fe₂O₃) Safe to Cleanse in Water Yes The base physical properties of Hematoid Quartz are consistent with the wider Quartz family: a specific gravity of 2.65, a refractive index of 1.544 to 1.553, and a birefringence of 0.009. Where it differs slightly from colourless Quartz varieties is in its weak pleochroism, a subtle variation in colour tone when viewed from different crystallographic directions. This is produced by the oriented iron oxide inclusions interacting with polarised light and is most visible in translucent specimens with well-distributed inclusions. The Role of Iron in Colour Iron is one of the most powerful colouring agents in the mineral kingdom, capable of producing a remarkable range of colours depending on its oxidation state, concentration, and mineral form. In Hematoid Quartz, the dominant iron mineral is Hematite (Fe₂O₃), which in its fine-grained or earthy form produces red and reddish-brown tones. Where iron is present as Limonite or Goethite, hydrated iron oxide minerals, the resulting colours shift toward yellow, orange, and brown. This is why Hematoid Quartz specimens can vary so significantly in colour. A crystal dominated by fine Hematite dust will appear deep red to blood orange, while one stained by Limonite or Goethite will tend toward golden yellow or amber. Specimens containing both iron phases can display striking multicoloured zones within a single crystal, recording changes in fluid chemistry during the mineral's growth history. Relationship to Other Iron-Bearing Quartz Varieties Hematoid Quartz sits within a broader family of iron-influenced Quartz types, each reflecting a different iron mineral or a different mechanism of colour introduction. Golden Healer Quartz is coated or stained by Limonite or Goethite, producing yellow to golden hues with no red component. Hematite Quartz contains discrete, well-formed Hematite crystals or plates within the Quartz, often producing metallic silver-grey reflections alongside red colouration. Faden Quartz with iron staining represents yet another variation where iron-rich fluids have moved along growth interruption planes. Tangerine Quartz, common from Madagascar, is a surface-coated variety with vivid orange Hematite or Limonite staining concentrated on the exterior of the crystal rather than internally. Understanding these distinctions matters for collectors assessing specimen quality, as the distribution, depth, and mineral form of the iron inclusions significantly affect both the appearance and the long-term stability of the colouration. Care and Handling At 7 on the Mohs Hardness Scale, Hematoid Quartz is a durable mineral well suited to handling and display. Brief rinsing with water is safe. However, specimens where the iron colouration is primarily a surface coating rather than internal inclusion should be treated with more care, as prolonged soaking may gradually affect the integrity of the iron oxide layer. A brief rinse rather than an extended soak is advisable for all specimens where surface staining is present. Store Hematoid Quartz away from softer minerals it might scratch, and handle faceted or polished specimens carefully to preserve surface quality. For general guidance on caring for your crystals, see our How to Cleanse and Recharge Your Crystals guide. Traditional Associations While this guide focuses on the mineralogy of Hematoid Quartz, it is widely used in spiritual and wellbeing practices. It is traditionally associated with grounding, transformation, clarity, and empowerment, and is commonly linked to the Root Chakra and Solar Plexus Chakra in crystal healing systems. These associations are rooted in cultural and traditional use rather than scientific properties. Browse our Hematoid Quartz collection to find the right piece for your practice. Summary Hematoid Quartz is a Quartz variety defined by the presence of Hematite or other iron oxide minerals incorporated during or after crystal growth. Its vivid red, orange, and golden tones are a direct record of iron-rich fluid activity in the geological environments where it formed. For collectors, it offers an accessible and visually striking example of how secondary mineralisation transforms a familiar mineral into something entirely distinctive. For general buyers, it is a durable, geologically interesting stone whose colours carry the chemical signature of some of Earth's most abundant and dynamic geological processes. Contact us here if you have any questions! Love, Laura Further Reading Hematite Mineral Guide Amber: The Science Behind the Fossil Resin The Best Root Chakra Stones and Crystals Best Crystals and Stones for Solar Plexus Chakra Healing How to Cleanse and Recharge Your Crystals How to Choose the Right Crystals Based on Their Shapes Advanced Crystal Choosing

on Jan 15 2025

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Smokey Quartz: One of Earth's Most Abundant Minerals and Its Most Misunderstood

What is Smokey Quartz? Mineral Group: Silicate | Category: Oxide Mineral | Formula: SiO₂ | Hardness: 7 (Mohs) Smokey Quartz is a variety of Quartz, one of the most abundant minerals in the Earth's crust, distinguished by its characteristic translucent brown to grey coloration. It belongs to the trigonal crystal system and shares its fundamental silicon dioxide composition with Clear Quartz, Amethyst, Citrine, and Rose Quartz. What separates Smokey Quartz from its colourless counterpart is not a difference in chemistry but in physics: the smoky colour is the result of natural radiation acting on trace aluminium impurities within the crystal structure over vast geological timescales. Quartz as a mineral group is defined by a framework of silicon and oxygen atoms arranged into a highly stable three-dimensional lattice. This structure is responsible for the hardness of 7 on the Mohs scale, the conchoidal fracture, and the resistance to chemical weathering that makes Quartz so persistent and widespread in the geological record. Smokey Quartz inherits all of these properties while adding the visual complexity of its radiation-induced colour. The name Smokey Quartz is widely used for this beloved variety. It is sometimes referred to historically by the name Morion, derived from a Greek and Latin term for a dark gemstone, which was applied broadly to dark translucent stones in antiquity. Scotland has a long association with the mineral, where it is known as Cairngorm after the Cairngorm Mountains in the Scottish Highlands, one of its most celebrated historical sources. Shop Smokey Quartz Formation and Geological Context Smokey Quartz forms in the same geological environments as other Quartz varieties: in igneous, metamorphic, and hydrothermal settings where silica-rich fluids cool slowly and allow well-developed crystals to grow. It is particularly common in granitic pegmatites, exceptionally coarse-grained igneous rocks that form from the final, water-rich stages of magma crystallisation. Pegmatites provide the space, the silica-saturated fluid, and the slow cooling conditions that allow Quartz crystals to grow to impressive sizes. Some of the world's largest and most well-formed Smokey Quartz crystals have been recovered from pegmatite bodies. The colour, however, does not come from the primary formation environment alone. It develops through a secondary process: natural irradiation. Most granitic rocks contain trace amounts of radioactive elements, particularly uranium and thorium, which emit low-level ionising radiation over millions of years. When this radiation passes through a Quartz crystal that contains trace amounts of aluminium substituting for silicon within the lattice, it displaces electrons from the aluminium atoms and traps them in neighbouring structural defects. These trapped electrons, known as colour centres, absorb specific wavelengths of visible light and produce the brown to grey smoky appearance. The intensity of the colour depends on the concentration of aluminium impurities, the cumulative radiation dose the crystal has been exposed to, and the temperature history of the rock. Heat above approximately 300 degrees Celsius will release the trapped electrons and bleach the colour entirely, returning the crystal to colourless Quartz. This is why Smokey Quartz is not typically found in high-temperature metamorphic settings, where any colour centres that developed would be repeatedly annealed out by heat. Major sources include Brazil, which produces the largest volumes of commercial material, as well as Madagascar, Switzerland, the United States, Australia, Scotland, and Russia. The Swiss Alps have yielded some of the finest large Smokey Quartz specimens in existence, recovered from fissures and cavities in alpine metamorphic and granitic rocks. Key Physical Properties Property Detail Mineral Group Silicate Category Oxide Mineral Crystal System Trigonal Hardness 7 Mohs Specific Gravity 2.65 Refractive Index 1.544 – 1.553 Birefringence Up to 0.009 Pleochroism None Lustre Vitreous Fracture Conchoidal Cleavage Indistinct Tenacity Brittle Colour Light smoky grey to dark brown Formula SiO₂ Safe to Cleanse in Water Yes The specific gravity of 2.65 is one of the most consistent values in mineralogy and is considered a diagnostic property of Quartz across all its varieties. The low birefringence of up to 0.009 means that the double refraction of light passing through the crystal is very slight, and the absence of pleochroism confirms that the colour does not change when the crystal is viewed from different directions, a useful identification characteristic when distinguishing Smokey Quartz from other brown gemstones. The Science of Colour in Smokey Quartz The colour mechanism in Smokey Quartz is among the best studied of any gemstone, and understanding it helps explain several practical aspects of working with the material. When ionising radiation strikes the Quartz lattice, it generates free electrons. In a pure silica crystal these electrons would quickly recombine and cause no lasting change. But where aluminium atoms have substituted into the lattice in place of silicon, they create charge imbalances and structural irregularities that act as traps for these free electrons. Once trapped, the electrons form what physicists call a colour centre, a defect in the electronic structure of the crystal that absorbs light in the yellow to green part of the visible spectrum. The complementary colours, browns and greys, are what reach the eye. This physics has a direct practical implication: Smokey Quartz can be artificially produced by irradiating colourless Quartz that contains aluminium impurities. Much of the very dark, almost black material sometimes sold as Smokey Quartz, occasionally marketed as Morion, is natural Quartz that has been artificially irradiated to intensify or produce its colour. The resulting material is chemically and structurally identical to naturally coloured specimens, but the colour is not the product of millions of years of geological exposure. Reputable dealers will indicate whether material has been treated. Natural Smokey Quartz tends toward more moderate, nuanced brown and grey tones. Very dark, uniform, near-opaque material with no tonal variation is more likely to have been artificially irradiated or may be a different material entirely. Smokey Quartz Within the Quartz Family Quartz is one of the most varied mineral species in terms of colour and appearance, and understanding where Smokey Quartz sits within that family helps contextualise its properties and value. All macrocrystalline Quartz varieties share the same fundamental SiO₂ composition and trigonal crystal system. Colour differences arise entirely from trace impurities and structural defects. Amethyst owes its purple colour to iron impurities and irradiation in a different structural configuration to Smokey Quartz. Citrine gets its yellow to orange tones from ferric iron, and most of the material on the market is Amethyst that has been heated until its colour centres convert. Rose Quartz derives its colour from microscopic inclusions of a fibrous pink mineral or from colour centres involving aluminium and phosphorus. Clear Quartz is simply the pure, defect-free form. You can also explore Hematoid Quartz and Golden Healer Quartz, two further Quartz varieties with their own fascinating colour stories. This means that transitions between varieties are possible under the right conditions. Natural heat can convert Amethyst to Citrine, and has produced the bicoloured material known as Ametrine where heating has been partial. Similarly, heat bleaches Smokey Quartz to colourless. Some specimens display colour zoning where smoky and clear zones exist within a single crystal, recording changing radiation or temperature conditions during the crystal's growth history. Care and Handling Smokey Quartz is one of the more robust minerals available to collectors and everyday users. Its hardness of 7 means it will resist scratching from most common materials, though it will scratch and be scratched by other Quartz varieties and harder minerals such as Topaz, Corundum, and Diamond. It is safe to cleanse in water. However, prolonged exposure to strong sunlight should be avoided: the same physical mechanism that creates the smoky colour can be partially reversed by sustained ultraviolet exposure over time, gradually fading the colour in specimens left in bright light for extended periods. Store away from direct sunlight and strong artificial UV sources to preserve the colour long term. Clean with a soft cloth or mild soapy water, rinse thoroughly, and dry completely. Avoid harsh chemical cleaners and ultrasonic cleaning equipment for any specimens with inclusions, fractures, or visible internal features that could be vulnerable to vibration. Traditional Associations While this guide focuses on the science of Smokey Quartz, it is widely valued in spiritual and mindful practices for its associations with grounding, protection, and emotional clarity. These associations are rooted in cultural and traditional use rather than scientific properties. For a full exploration of how to work with Smokey Quartz spiritually, see our dedicated spiritual guide. Summary Smokey Quartz is a radiation-coloured variety of Quartz, one of the Earth's most abundant and geologically significant minerals. Its smoky brown to grey tones are the visible record of millions of years of natural irradiation acting on trace aluminium within a silicon dioxide crystal lattice, a colour mechanism that is both scientifically well understood and practically relevant to anyone buying or collecting the material. Durable, widely available, and scientifically interesting, it is an excellent entry point into the Quartz family and a rewarding specimen for collectors at any level of experience. Shop all Smokey Quartz As always, our inbox and DMs are open if you would like guidance or simply wish to explore further. Contact us Love, Laura Further Reading Citrine: Turns Out Most of It Is Just Amethyst That Got Too Hot Amethyst: The Stone That Sobered Up Ancient Greeks and Bankrupted the Gem Trade Hematoid Quartz: Clear Quartz That Ran Into Iron and Never Looked Back Golden Healer Quartz: The Science Behind the Glow Clear Quartz: The Mineral Inside Your Watch, Your Phone, and Your Collection All How to Work with Quartz Guides

on Feb 09 2025

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