Rainbow Sapphire 4mm Round Faceted - 15-16 Inch Blue Kyanite the third to hardest common

the third to hardest common natural gemstone

It is composed of silicon dioxide

Rhodochrosite is a bubblegum pink to rose red stone

this beautiful Rose Quartz rock specimen is perfect for gift giving or keep for yourself

Green Lodolite is Quartz with inclusions of sand

Rainbow Sapphire 4mm Round Faceted - 15-16 Inch Blue Kyanite the third to hardest commonSapphires are precious gemstones, but unlike rubies, they come in a rainbow of colors besides red! They are all varieties of the mineral corundum, known for its incredible hardness, second only to diamond . This makes sapphires very durable and scratch resistant. Formed deep underground during the cooling of magma, sapphires get their various colors from trace elements. Iron gives them blue, the most famous sapphire color, while titanium can create