Iceland spar

2025-05-20

Iceland spar, a kind of colorless and transparent calcite, is the purest calcium carbonate crystal in nature. This kind of calcite has an interesting feature that when looking through it, one can see two images of an object. Therefore, Iceland spar is an important optical material. Calcite is the main mineral of limestone and marble, which has many uses in production and life. We know that limestone can form karst caves, where stalactites, stalagmites and white marble are actually composed of calcite.

Chinese source: baidu baike