Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...

Strange blue rings found in Scandinavian trees leave scientists perplexed - Rings hint at unusually cold summers in Norway ...

Princess Diana picked her 12-carat sapphire and diamond engagement ring. Prince William proposed to Kate Middleton with the same ring.

Today, Kirstin Ash has released a new — and highly anticipated — capsule collection, Ink. Adorned with blue sapphire nano ...