Mineraloid
Mineraloid is the time period used for the ones materials that don’t match smartly into the sort of eight training. Opal, jet, amber, and mother of pearl all belong to the mineraloids.
Opal
Opals are a unique and mesmerizing gemstone known for their distinctive play of color, making them one of the most sought-after and mysterious gemstones...
Obsidian
Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. It is an amorphous material known as a "mineraloid." The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture .