Zoisite

Zoisite is a popular gemstone composed of calcium aluminum silicate. ^[1]

Zoisite: Quick Facts and Characteristics

Some quick facts for Zoisite:

• Transparency: Zoisite can be opaque or translucent.
• Crystallography: In terms of crystallography, zoisite is orthorhombic.
• Luster: In terms of luster, zoisite is vitreous (glassy).
• Streak: Zoisite streaks white.
• Specific Gravity: Zoisite's specific gravity ranges from 3.2 to 3.4.

Zoisite: Background and Summary

Zoisite is a mineral that is commonly found in metamorphic rocks, especially in areas where the rocks have been subjected to high temperatures and pressures. It is a calcium aluminum silicate mineral that typically forms in prismatic or tabular crystals, but can also occur in massive or granular forms. The mineral is named after its discoverer, the Slovenian naturalist Sigmund Zois.

Zoisite is relatively easy to identify due to its distinctive coloration and crystal habit. The mineral typically occurs in shades of green, gray, brown, or pink, and often exhibits a characteristic "splintery" or "fibrous" texture. Another identifying feature of zoisite is its relatively high hardness, which ranges between 6.5 and 7 on the Mohs scale. Zoisite can also be distinguished from other green minerals, such as epidote or chlorite, by its crystal habit and chemical composition.

Zoisite has a number of uses in various industries. One of the most common applications of the mineral is as a decorative stone for jewelry and other ornamental objects. Zoisite is also used as a refractory material in the production of high-temperature ceramics and as a component in some types of cement. Additionally, zoisite is sometimes used in the manufacture of synthetic gemstones, such as the popular gemstone variety known as "tanzanite".