Van Clive &; Arpels) is a world-famous jewelry brand, and its blue gemstone series is very famous. Van Cleef & Arpels is famous for using high-quality sapphires, especially the combination of sapphires and diamonds.

There are many ways to classify sapphire according to its color and origin. However, in Van Cleef & Arpels' jewelry design, the most common and important sapphire varieties are Kashmir sapphire, Myanmar sapphire and Ceylon sapphire.

Kashmir sapphire is one of the rarest and most precious sapphires, which is produced in Kashmir. It has a dark blue tone, sometimes with subtle purple. Kashmir sapphire is highly sought after for its quality and scarcity.

Burmese sapphire is also one of the most popular varieties. It's from Myanmar. It has a dark blue tone and sometimes a green tone. Burmese sapphires are famous for their bright colors and high quality.

Ceylon sapphire (also known as Sri Lankan sapphire) is produced in Sri Lanka, with various colors, such as light blue, medium blue and deep blue. Ceylon sapphire is highly respected by the jewelry industry because of its rich colors.

In addition to these main varieties, there are other sapphire varieties, such as Thai sapphire and Australian sapphire. Each sapphire has its own unique characteristics and value, and different kinds of sapphires can be seen in Van Cleef & Arpels' jewelry.

Generally speaking, Van Cleef & Arpels' sapphire series contains several different sapphire varieties, among which Kashmir sapphire, Myanmar sapphire and Ceylon sapphire are the most famous and important.