Color and clarity
Compare stones in everyday light. Look at how inclusions affect transparency and brightness rather than expecting every natural ruby to be perfectly clear.
Ruby
Vivid red color gives ruby a presence all its own.
Ruby is red corundum, the same mineral family as sapphire. Chromium gives it its characteristic color.
- Mineral
- Corundum
- Birthstone
- July
- Mohs hardness
- 9
Choosing a ruby
Color is central to ruby’s appeal. Fine stones often show vibrant red to slightly purplish red, but each gem should be judged as a whole. Origin alone does not guarantee quality. Consider color, transparency, cut, size, and treatment together.
Learn more: GIA: Ruby
Choosing your ruby
Treatment and reports
Heat treatment and fracture filling are different processes. Ask what has been done to the stone and whether there is an independent report. Treatment can affect value and cleaning requirements.
Learn more: GIA: qualities to consider
Care
Untreated and heat-treated ruby can be durable choices for rings. Fracture-filled, cavity-filled, or dyed stones need special care and may be damaged by mild acids. For these, use a damp cloth and follow the jeweler’s advice. Confirm treatment before using ultrasonic or steam cleaners.
Learn more: GIA: care and cleaning
Find the right piece for you.
We can help you compare materials, choose a gemstone, and understand how to care for your jewelry.