[Koshu Precious Stones] Brazilian Aquamarine 5.209ct Loose Stone with Certificate of Authenticity

Aquamarine is said to have been used by fishermen as a talisman for sailing in the past. It is a mineral called "beryl" like emerald, and blue to light blue stones like this one that resemble the sea are called "aquamarine". This milky aquamarine loose stone is a collaboration between Shimizu Kiseki and Yoichi Fukazawa, made by Koshu Kiseki Kiriko .

This Koshu Kiseki Kiriko was created by two master craftsmen, Yukio Shimizu, president of Shimizu Kiseki, and Yoichi Fukasawa, president of Jewelry Craft Fukasawa. Shimizu created the facets, and Fukasawa created the cut surfaces. It is a checkerboard cut with a colorful design. The size is 13.5 x 11 mm.

Type: Loose (natural stone)
・Stone name: Aquamarine
・Weight: 5.209ct
・Size: 13.5×11.0mm
Shape: Custom cut
・Scratches/chips: S
・Inclusions:
・Note: Usually heated. Impregnated with a transparent agent. *Aquamarine is generally a gemstone that has been heated. However, with current identification technology, it is difficult to distinguish between heated and unheated, so the treatment is described as "usually heated."
・Accessories: Certificate of Authenticity (Japan-Germany Gemstone Laboratory), loose case (if it does not fit, a clear case with zip)

*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 .


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