Cashmere sapphires are highly prized and rare gemstones that originate from the Kashmir region of India, particularly the Himalayas. These sapphires are renowned for their exceptional color, typically described as a vivid or velvety blue. What makes them especially valuable is their unique, slightly milky or velvety appearance, caused by fine silk inclusions within the stone. This characteristic sets Cashmere sapphires apart from sapphires from other regions.

Key features of Cashmere sapphires include:
- **Color**: A rich, velvety blue with a slight softness or milkiness, often regarded as the finest blue among sapphires.
- **Rarity**: Mining in Kashmir ceased in the late 19th century, making these gems incredibly scarce. Most available Cashmere sapphires today are found in private collections or auction houses.
- **Origin**: They come from the Zanskar range of the Himalayas, and the specific mining period was between the late 19th and early 20th centuries.

Due to their rarity and exceptional qualities, Cashmere sapphires command very high prices in the gemstone market and are highly sought after by collectors and connoisseurs