2/15/2024 0 Comments Properties of snowflake obsidianHowever, when it cools down afterwards, it returns to its translucent or opaque state and becomes whitish again.Ĭristobalite occurs in igneous rocks located in areas of volcanicĪctivity, often lining gas bubbles in the host rock.Ĭristobalite is used in scientific study. When heated to 350✯ (180✬), Cristobalite becomes clear and transparent. Crystals are occasionally cubic.ġ) Crystals exhibit a strong double refraction. It also occurs massive, platy, crusty, and stalactitic. Cristobalite is much more common in globular groups and as crusty rounded balls. The octahedral crystals may be twinned with Spinel twinning. White, light gray, light yellow, light brown, blue-grayĬristobalite is a always a pseudomorph after Beta Cristobalite, which crystallizes in the isometric system, and thus Cristobalite occurs in isometric shaped crystals.Ĭlick here for a detailed explanation on the crystal structure of Cristobalite and other forms of silica.Ĭrystals are usually in microscopic grains, and small octahedral crystals can be made out under magnification. ![]() Snowflake obsidian, a popular form of obsidian with white snowflake-like formations on it, is in fact obsidian with small white inclusions of Cristobalite, where the white microscopic crystals form a pattern giving it a snowflake-like effect. It usually forms in vesicles and gas pockets with the obsidian. Cristobalite is found in volcanic sources almost always associated with the natural glass rock obsidian. It is composed of the same elements as Quartz but has a different crystal structure, making it a separate mineral.
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