Buying Guide
Padparadscha Sapphire: Colour, Origins and Buying Tips
A padparadscha sapphire is a rare natural sapphire that blends pink and orange. Here is how to judge the colour, spot beryllium treatment...
6 min readGemstone Treatments: articles and guides
Every Raza Gems article about Gemstone Treatments, written in plain English.
Buying Guide
Glass Filled Ruby: What It Is and How to Spot It
A glass filled ruby is low-grade ruby with its cracks filled with lead glass. Learn how to spot one, what lab reports say, how to care fo...
6 min read
Buying Guide
Heated vs Unheated Sapphire: Which Should You Buy?
Heated and unheated sapphires are both natural. Learn what heat does, why most sapphires are heated, how labs detect it and what to ask b...
6 min read
Buying Guide
Gemstone Treatments: A Clear Guide for Buyers
Most coloured gemstones are treated. Learn what heating, oiling, filling, diffusion, irradiation, dyeing, coating and impregnation do, wh...
8 min readShop the stones you read about
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