Here is a thorough gemological description of parti sapphires — what makes them special, how to recognize them, what affects their value, and things to look for if you’re buying one. If you want a version for an appraisal report or sales catalog, I can format that too.

What is a Parti Sapphire

• The word “parti” (short for “partitioned”) refers to sapphires that show two or more distinct colors in a single crystal, separated in zones rather than blended uniformly.

• They are also sometimes called bi-color (two colors) or tri-color sapphires when they show three colors.

• Common color combinations include blue + green, green + yellow, blue + yellow, and more exotic variations such as blue + purple, or tri-zones of blue, green, yellow.