News Archive

Blue Star Sapphire

There has been a steady price increase observed in blue star sapphire market in recent years. Interestingly, the upward trend is caused by growing scarcity of the high quality sapphire in general and not a…

Fluorite

Introduction & History Fluorite is calcium fluoride (CaF2). It is well known in the mineralogical world and is often seen as well-formed crystals or crystal groups. Fluorite’s low durability has lessened its importance in the world…

Imperial Topaz

It is stated in this colored stone market report that imperial topaz in the best quality is scarce and prices have gone up. What used to be a few hundred dollars per carat is now…

Book Review – Gem Testing Techniques

Gem Testing Techniques By Alan Hodgkinson Published by Valerie Hodgkinson First printing limited edition 1,000 copies 552 full color pages £128 in the UK, higher elsewhere www.gemtestingtechniques.co.uk   On a Friday in early May, Alan Hodgkinson unveiled his much anticipated book Gem…