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Calcite, like most carbonates, will dissolve with most forms of acid. Virtually all calcite chucks sold on the market are dipped in acid to make the surface smooth and shiny. Calcite is fluorescent or will glow under a black light.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.