Sapphire + Ruby (Corundum)
Sapphire and
ruby are both corundum — the same mineral with wildly different color personalities. When it comes to durability, this family is hard to beat.
At 9 on the Mohs scale, corundum resists scratching extremely well. It also has strong toughness and no true cleavage, meaning there aren’t built-in splitting planes waiting for the wrong angle.
This is why sapphires work so well as engagement rings. And the colors are endless: teals that shift like deep water, Montana stones with that wild, open-sky energy, pink sapphires with cotton candy realness, classic royal blues worthy of crown jewels.
Ditto for rubies – same structure, same resilience, just a different mood. Saturated, velvety, decadent, and entirely capable of handling daily wear.
Chrysoberyl
Chrysoberyl doesn’t get the hype sapphire does, but in terms of durability, it’s sitting right there.
At 8.5 on the Mohs scale, it’s harder than spinel, tourmaline, or tanzanite, and just a step below corundum. It resists scratching well, and it doesn’t have the cleavage lines that make some stones more vulnerable to chipping.
The color radiates golden warmth — rich honey, deeper olive, sometimes that unexpected flash of green that surprises you when the light shifts. It’s especially sunlit in yellow or peach gold settings.
If you want an uncommon gem that will truly last, chrysoberyl is one of the most underhyped yet incredible warm-toned stones around.
