Green Tsavorite Garnet 7.5mm Round A Grade - 15-16 Inch 48hr_04162024 which may range from yellow

which may range from yellow to green to olive green to brownish green

Petrification occurs when the wood is covered by sedimentary rock

Obsidian is produced when lava erupts from a volcano and cools rapidly with minimal crystal growth

gray and white

Sardonyx is sometimes treated to bring out its reddish tones

Green Tsavorite Garnet 7.5mm Round A Grade - 15-16 Inch 48hr_04162024 which may range from yellowGarnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. All species of garnets possess similar physical properties and crystal forms, but differ in chemical composition. The different species are pyrope, almandine, spessartine, grossular (varieties of which are hessonite or cinnamon stone and tsavorite), uvarovite and andradite.