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

Aquamarine Oval 2.72 Carat - Rare Gemstone Company

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

The Splendour of Spinel, part 2: Types and Treatments

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

Aquamarine Emerald Cut Long 8.73 Carat - Rare Gemstone Company

High Iron Yellow Sapphire with Beryllium Treatment - ICA

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

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

Angular color zoning with rounded looking 'angles'; viewed immersed in