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Crystal Encyclopedia

Lava Stone

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Lava stone is a type of igneous rock formed from the rapid cooling of lava that is rich in magnesium and iron. This cooling typically happens at or near the surface of the earth, as in the case of volcanic eruptions. The rapid cooling does not allow for large crystals to form, resulting in the […]

Thulite

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Thulite is a variety of the mineral zoisite known for its striking pink color. The pink hue is primarily due to manganese ions replacing calcium in the mineral’s structure. In terms of composition, thulite is a calcium aluminum silicate mineral. Like other zoisite varieties, it shares the chemical formula Ca2Al3(SiO4)3(OH)Ca2​Al3​(SiO4​)3​(OH). Historically, thulite holds a relatively […]

Matrix Opal

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Matrix opal is a captivating variation of opal renowned for its unique appearance and geological formation. Unlike traditional opals, which are typically found in solid form, matrix opal is formed within a host rock or matrix, creating a stunning mosaic-like effect. Opals themselves are mesmerizing gemstones prized for their play-of-color, an optical phenomenon where vibrant […]

Persian Turquoise

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Persian turquoise refers to turquoise gemstones mined in Iran, historically known as Persia. It is prized for its intense, sky-blue to greenish-blue color, often with intricate veining or matrix patterns, which enhance its beauty. This gemstone has been treasured for thousands of years for its vivid hue and has been used in jewelry, decorative arts, […]

Laguna Agate

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Laguna Agate is a type of colorful gemstone, highly prized for its vibrant hues and intricate patterns. It belongs to the chalcedony family, which is a form of microcrystalline quartz. What distinguishes Laguna Agate is its unique combination of vivid colors and banding, making each piece truly one-of-a-kind. Laguna Agate (oakrocks.net) The gemstone typically exhibits […]

K2 Stone

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K2 Stone, also known as K2 Jasper or K2 Granite, is a unique and intriguing natural stone that has gained popularity in the gem and mineral community primarily for its striking appearance and interesting composition. It’s not a jasper or granite in the traditional sense, but it’s commonly referred to by these names because of […]

Velvet Obsidian

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Velvet Obsidian is a natural volcanic glass formed from the rapid cooling of viscous lava. What sets it apart is its lustrous sheen and rich texture that resembles velvet, hence the name. This sheen is caused by the reflection of light off the tiny gas bubbles trapped within the glass during its rapid cooling process. […]