Ruby

What Is Ruby?

Color, origin, treatment, and why two red stones can be worth $5 or $1 million a carat.

The Most Expensive Rubies Ever Sold

The auction records, the price per carat, and the three attributes every record-setter shares.

Glass-Filled Ruby

How to spot it, why it isn't really ruby, and what it's actually worth.

Spinel vs. Ruby

How to tell them apart, why spinel was mistaken for ruby for centuries, and why it still costs a fraction.

Ruby Price Per Carat (2026)

What a ruby is actually worth by quality, origin, treatment and size, and how to read the numbers.

Mozambique Ruby Mines: The State Wants 20%

The 5-minute weekly intelligence on the colored stone market. · October 27, 2026

Ruby Price Per Carat: $564 at Gemfields' October Auction

The 5-minute weekly intelligence on the colored stone market. · October 20, 2026

The Warning Was Smaller Than The Bill.

The 5-minute weekly intelligence on the colored stone market. · October 6, 2026

The Grade Problem Got A Price Tag.

Gemfields warns of a $73.5M H1 loss on a $125.2M Montepuez ruby impairment.

Ruby vs. Sapphire

How to tell them apart, and why the top of the market favors ruby.

Revenue Rebounded. The Grade Didn't.

The 5-minute weekly intelligence on the colored stone market. · August 18, 2026

Premium Ran Thin. Demand Held.

The 5-minute weekly intelligence on the colored stone market. · July 7, 2026

Sapphire Up. Ruby Pulls Back.

The 5-minute weekly intelligence on the colored stone market. · June 23, 2026

Ruby vs. Garnet: How to Tell Them Apart - And Why the Price Gap Is Massive

Emerald Up. Ruby Held Back.

The 5-minute weekly intelligence on the colored stone market.May 26, 2026