July birthstone: ruby

Ruby is July’s only birthstone — vivid red, durable, and one of the most coveted colored gemstones in the world. See the ruby guide for color tiers, origin (Burma vs Mozambique), and the lead-glass-filling treatment to avoid.

At Mohs 9, ruby is hardy enough for daily wear in any setting. A July-birthstone ring will outlive its setting; pendants and earrings are similarly forever.

Choosing for a gift

• A first birthstone necklace — a bezel-set ruby pendant, 0.10–0.30 ct. Color quality matters more than size at this scale.
• A milestone birthday — earrings or a three-stone ring with ruby center.
• The 40th anniversary — ruby is the traditional gift. A ring or pendant in the “pigeon’s blood” color range is the hero piece.

Insist on the report

Any ruby over about 0.5 ct should come with a lab report (GIA, GRS, SSEF, AGL) disclosing treatment status. “Heat only” is the trade standard and fine. “Lead glass filled” is a hard pass for a gift you want to last.