Gemstone Guides

Buying guides written at the source: what to look for, what a stone is worth, and what the trade rarely says out loud.

Macro of rough blue sapphire crystals on a dark background, the natural state before any heat treatment

Unheated vs Heated Sapphire: What "Unheated" Really Means and How to Verify It

What each term really means, why unheated stones cost more, and exactly how to verify the claim on a lab report, from a sourcer who buys sapphire at the mine in Sri Lanka.

PAR Ilyes Makria•JUN 9, 2026

Language & Currency

EUROPE

AMERICA

ASIA-PACIFIC

MIDDLE EAST

OTHER LOCATIONS

Gemstone Guides

Unheated vs Heated Sapphire: What "Unheated" Really Means and How to Verify It

The Complete Guide to Spinel: The Connoisseur's Underrated Gem

The Complete Guide to Sapphire: Hardness, Durability, Colors and Value

Gemstones Shop Near Me: How to Find a Real One (and Not Get Burned in 2026)

Tanzanite or Sapphire: How to Choose the Right Blue Gemstone

Ruby Gemstones: The Complete Buying Guide for 2026

Citrine and Diamond Ring: How to Choose, What to Pay, and What to Avoid