A parti sapphire is a unique and striking type of sapphire that displays multiple colors within the same stone. The term "parti" comes from the word "parti-colored," referring to the way the sapphire showcases distinct color zones or transitions between hues. These sapphires are typically found in shades of blue, green, yellow, or even a combination of all three.

The most common color patterns in parti sapphires are blue and green, blue and yellow, or green and yellow. The distinct color zones are the result of varying trace elements like iron, titanium, or chromium in the crystal structure. These stones often feature a striking contrast between colors, which makes them stand out in jewelry.

Parti sapphires are highly valued for their rarity and visual appeal, especially since each stone is unique. They are typically found in regions like Australia, where sapphires with these vibrant and unusual color patterns are mined. When cut properly, parti sapphires can display a dazzling play of colors that change with the light, making them a popular choice for those looking for something different and visually captivating in their gemstone collection.