Limited to 10 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases.

Montana sapphires began when Dr. J.F. Kunz, a vice president of Tiffany & Co., proved that blue rough stones found in Yogo Valley, Montana, were sapphires. There are several deposits, but this one is from Yogo, which can be said to be the birthplace of Montana sapphires. Yogo mainly produces blue to violet sapphires. Yogo sapphires are now closed, so they are a rare stone with no new production .

This is an unheated Yogo sapphire rough that just arrived from Tucson, USA in 2025. Yogo sapphires in the USA are characterized by their flat rough stones , and this rough stone also has these characteristics. It is 0.35ct on average. You will receive one of the 10 stones in the photo.

This product is eligible for multiple purchase discounts .
You can get a discount by purchasing multiple items at the same time. You can get a discount by purchasing multiple items of this product, but you can also get a discount by purchasing this product together with other multiple discount items. If you purchase two items, you will get a 1,000 yen discount off the total, and if you purchase three items, you will get a 1,500 yen discount off the total.


・Type: Loose
Stone name: Montana Yogo sapphire
Quantity: 1 stone (1 stone shown in the photo)
Size: Ruler photo Notes: ---
・Accessories: Case
*The photo is an example.

*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.

*As this is a random item, we cannot accept selection requests.

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

*For other frequently asked questions, please click here .

*This product does not come with a Caratz quality guarantee certificate.

karatz_id :90002610