Emeralds

The Chalk Emerald, Hooker Emerald, Patricia Emerald, Devonshire Emerald

Sapphires

Bismark Sapphire, The Logan Sapphire, The Star of Bombay, The Star of India

Rubies

The Carmen Lucia Ruby, The Richard Burton Ruby, The DeLong Star Ruby

Topaz

The Adiel Topaz, The American Golden Topaz,

Spinel

The Timur Ruby, The Samarian Spinel, Russian imperial crown Spinel, The Black Prince’s Ruby