Blue color zoning observed in some of the unusual rubies; immersed in

Strong blue color zones were observed in many of the Jegdalek rubies.

InVogueJewelry: Emeralds, Rubies and Sapphires from India are FAKE: Really DYED SILLIMANITE!

PDF) Challenging Synthetic Rubies Examined in GIA's Bangkok and Hong Kong Laboratories

Geology and mineralogy of sapphire-rich metasomatites (sapphirites) deposit at the Portezuelo de Pajas Blancas, northern Chile: Genetic implications for unusual metasomatic processes in the Central Andes - ScienceDirect

What Is A Diffused Sapphire

Blue Ridge Parkway Travel Planner - 73rd Edition by Blue Ridge Parkway Association - Issuu

PDF) Challenging Synthetic Rubies Examined in GIA's Bangkok and Hong Kong Laboratories

The curse of the sapphire

The infrared spectrum of powdered danburite from Luc Yen shows a broad