6mm Blue Sapphire Pendant in 14 Karat Gold c7164a728d0c1279cb0eaae344eb84f6

6mm Blue Sapphire Pendant in 14 Karat Gold c7164a728d0c1279cb0eaae344eb84f6The word sapphire comes from the Greek translation for blue and was used in ancient times to describe any blue stone, often lapis lazuli. Around 1800 it was discovered that sapphires are a gem variety of corundum, the other being ruby. Corundum is a hard stone, rating a 9 on the Mohs scale, making it the second hardest natural mineral. Its chemical composition is aluminum oxide. The many colors in which corundum occurs are due to the presence of other

spiny oyster

leaving its victim alive for future feeding

Although there is some evidence of man's contribution

The Green River Formation in the USA covers an area over 25

normally found still attached to its host matrix rock

mineral rich water finds its way in and out of the now hardened bubble which allows for the formation of crystal inside the bubble

fungicides and pesticides

Peridot is the gem variety of the mineral Olivine

pyrite gives off sparks

One type of Rose quartz is often used in sculptures and lapidary work

Growing to lengths of nearly 30ft

The name Trilobite means "three lobes"