24 Cr Chromium transition

Chromium

Atomic number 24
Symbol Cr
Category Transition
Crystal system Cubic
1 mineral in the collection
Discovered : Louis-Nicolas Vauquelin, 1798. Named from Greek chroma (color).
Found in : Crocoite, chrome diopside, uvarovite garnet, chromite.
Used for : Stainless steel, chrome plating, pigments.
Remarkable : Gives rubies their red and emeralds their green. Also the element that makes stainless steel stainless.

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