[Koshu Precious Stone Kiriko] London Blue Topaz 10.514ct《Collaboration》Loose with emblem

Blue topaz, with its attractive blue color, is one of the most popular colors among the many color variations of topaz. Among them, "London blue topaz" refers to a deep blue stone that is almost navy blue, like this loose stone. It is the most valuable stone among the three types of blue topaz.

This is a London blue topaz called "Checkers x Dawn" made by Koshu Precious Stone, a collaborative piece between Shimizu Precious Stone and Yoichi Fukasawa .

This Koshu Kiseki Kiriko was created by two master craftsmen, Shimizu Kiseki's representative Yukio Shimizu and Jewelry Craft Fukasawa's representative Yoichi Fukasawa. Shimizu created the facets, and Fukasawa created the cut glass. This is a collaborative work between Shimizu Kiseki, Yoichi Fukasawa and KARATZ.
A special patch is included.


Type: Loose (natural stone)
Stone name: London blue topaz ( blue topaz )
Weight: 10.514ct
・Scratches/chips: S
Inclusions: S
・Note: Irradiation treatment is usually performed.
*London blue topaz is generally a gemstone that has been irradiated.
・Accessories: Caratz quality guarantee, case

▷For more information about Blue Topaz
Blue Topaz | Skye, Switzerland, London: Which is the most valuable?


*We try to make the colors in the photos as close as possible to the actual product, but they may look slightly different from the actual product depending on the lighting conditions at the time of shooting and the monitor environment you are using. Also, some photos may have been taken using a penlight.

*For information on scratches, chips, treatments, and inclusions, please click here .

*For other frequently asked questions, please click here .
*If you pay by credit card, the security company may contact you to verify your identity.



karatz_item_id: 12539481