Briefly

Curtain stone

Ingredients: calcium hydroxysilicate aluminum

Hardness: 6.5

Specific gravity: 3.35

Refractive index: 1.69-1.70

Birefringence: 0.010

There are many varieties, the most popular is Danquan Stone, a variant of sapphire color due to the presence of vanadium. Danquan stone has a remarkable multi-color color, which is purple, blue or stone gray, depending on the viewing angle; it will produce a slight color change under incandescent light. A curtain-like green variant containing ruby, sometimes containing black hornblende inclusions, polished, engraved or framed to create a decorative or striking decorative gemstone. Manganese zoisite, a pink block-like variant produced by manganese, which can be polished or engraved to make small ornaments. Danquan stone is often confused with sapphire and manganese scutellite.

Origin: First discovered in Tanzania, yellow and green zoisite are distributed in Tanzania and Kenya, and manganese zoisite is distributed in Norway, Austria, Western Australia, Italy and the United States in Carolina.

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