pigeon's blood

Color types such as "pigeon's blood," "cobalt blue" and "Santa Maria" are wildly popular, but also wildly inconsistent.

Color types such as "pigeon's blood," "cobalt blue" and "Santa Maria" are wildly popular, but also wildly inconsistent. Richard Hughes takes a deep dive into the problems of describing color.

The author makes his first pilgrimage to Burma's Mogok Stone Tract.

A brief description of the color types for ruby and sapphire used at Lotus Gemology.

A loving look at ruby – the gem of passion – from the standpoint of the connoisseur.