Traits

One of three Gemstone genes, Sapphire is comparable to the Amber gene in Norwegian Forest Cats, and appears as a drastic pelt change with age. Over time, the Sapphire (eses) gene will begin to turn black pigment a sapphire (blue) color starting from the back and working its way down.

A Solid Black cat will turn Sapphire but may retain black striping, as well as a black nose leather. A Black Tabby will turn into a Sapphire Tabby, similar to a Blue Tabby but richer. A Black/Red tortoiseshell will become Sapphire/Red.  

This is a recessive gene, so a cat with (Ees) would be only a carrier of the gene.

See also: Amber and Ruby.