Learn

The Criterion – Connoisseurship in Ruby & Sapphire

What the cognoscenti look for when evaluating ruby and sapphire.

Ruby Evaluation & Buyer’s Guide – A Primer

• Color in Ruby

Sapphire Buyer’s Guide

Gemstone Forensics

A Connoisseurs Guide To Rainbow Sapphires

Mozambique Ruby

Clarities, Enhancements & More

A Brief Introduction To Colored Gemstone Clarity Grading

Enhancements in Ruby & Sapphire ( Part 1)

Glass Filled Ruby

Beryllium Treatment in Sapphire

How do I Grade and Value the Different Colors And Sizes Of Blue Sapphire?

Valuing Ruby & Sapphire

In this part of the Learn Section we look at the value ranges for ruby and sapphire. Please make sure you are familiar with all the concepts covered within The Criterion, and Clarities, Enhancements & More sections before using this section¹.

Pricing Unheated Ruby – An Interactive Calculator

Pricing Unheated Blue Sapphire – An Interactive Calculator

Ruby & Sapphire FAQ’s

The History Of Fine Jewelry

And Its Significant Eras & Biographies Of Revered Fine Jewelry Houses

Musings & Reflections on other Gemstones

Tanzanite Dreams

Gemstone Advisory