A Brief Summary of Alexandrite of The Urals (Russia)

A Brief Summary of Alexandrite of The Urals (Russia) The International Colored Gemstone Assocation (ICA) recently published a lengthy article in their InColor Magazine Publication (Issue 44- Fall 2019) regarding the current status of Alexandrites from Russia. We recently blogged on the topic regarding Yakov Kokovin’s historical connection with Alexandrite, and how he had been … Read more A Brief Summary of Alexandrite of The Urals (Russia)

From Padparadscha to Pink Sapphire | GIA’s Color Stability Test

In the past, we have emphasized the importance of gem labs when it comes to buying gemstones. Most recently, we discussed how certain sapphires that appear to look like “Padparadscha” need to go through color stability testing in order to make sure they do not lose their color. That is, losing their color so they … Read more From Padparadscha to Pink Sapphire | GIA’s Color Stability Test

GRS Type Sunrise and Sunset Padparadscha v. GIA Padparadscha

A common issue customers and gem dealers face is when two labs disagree on a gemstone. A lot of times these disagreements are about heat treatment v. non-heat treatment, and correct origin (Ceylon v. Burma etc..). The same issue arises when one lab calls a certain variety of sapphire as “Padparadscha,” and another classifies it … Read more GRS Type Sunrise and Sunset Padparadscha v. GIA Padparadscha

What is Sapphirine?

What is Sapphirine? The scintillating blue stone was given the name of “Sapphirine” due to its striking resemblance to sapphire. However, both minerals have completely different chemical make-ups and properties. The stone owes its namesake to its striking blue color, but in some instances it forms in a reddish-orange color. The stone is very rare … Read more What is Sapphirine?

Russian Alexandrite’s History

Russian Alexandrite’s History The origins of the first Russian Alexandrite (Chrysoberyl with strong change) require official credit to a person named Yakov Vasilevich Kokovin, or Y.A. Kokovin. According to gem historian Richard A. Wise, Kokovin was the Russian Ural Mountain Mine Manager around the 1800s. (Wise, 2016). Wise’s reference to Kokovin, albeit brief, is to … Read more Russian Alexandrite’s History

What is a Padparadscha Sapphire? (UPDATED 2019 Definition)

Introduction To Padparadscha A Padparadscha Sapphire is a fancy colored sapphire that is a mix of orange and pink color. Gem Labs Definition According to many gem labs, the precise definition “is a variety of corundum from any geographical origin whose colour is a subtle mixture of pinkish orange to orangey pink with pastel tones … Read more What is a Padparadscha Sapphire? (UPDATED 2019 Definition)