News Archive

Practical Gemmology

Robert Webster's Practical Gemmology was first published in 1943. It was regarded as one of the primary readings in gemological education in the UK. The 6th and the last edition, was published in 1976. Naturally…

Flux Ruby Levels

Flux residue in ruby started to show up in the early to mid 1990s. The residue occurs when ruby, mostly from the Mong Hsu deposit in Burma, is heated to extreme temperatures. To protect the…

Colored Stone Market

Buyers at JCK focus on specific products and price points. Colored stone business concentrated at high and low end with the middle soft. Colored stone confidence may be gaining with slightly improved sales. Corundum and…

Market Trends: Padparadscha

Padparadscha sapphire is one of the rarest of all corundum varieties. The delicate pinkish orange color ”what Richard Hughes refers to as a marriage of ruby and yellow sapphire” is a true connoisseur's gem. Initially…

Diamond Market

It is definitely strange times for the diamond markets now. We are in one of those "depends on who you talk to" phases when it comes to diamond prices and predictions. Markets are slow and…