Montana Sapphire 0.308ct loose (bicolor sapphire)

Montana sapphire began when Dr. J.F. Kunz, then a vice president at Tiffany & Co., proved that a blue rough stone found in Yogo Valley in Montana was sapphire. There are several deposits, and the trends differ depending on the location, but overall it is characterized by high transparency and many fancy colors. This is a bi-colored Montana sapphire with blue and colorless colors.

・Type: Loose (natural stone)
・Stone name: Montana sapphire (Montana sapphire)
・Weight: 0.308ct
・Size: 4.6×3.6mm
・Shape: Oval cut
・Scratch/chip: S
・Inclusion: A+
・Note: Heating is being performed.
*Sapphires are generally heated gemstones.
・Accessories: Karatz quality guarantee, loose case (if it doesn't fit, clear case with zip)

▷For more information about Montana Sapphire
What is Montana sapphire? History, characteristics, values, etc.


▷Jewelry processing available If you would like jewelry processing, please place an order along with your desired frame from the link below.
・[Choose from stones] Simple order
・[Choose from stones] Semi-order
*If you would like a photo of a stone placed in a frame, would like to discuss a full order, or have any other questions or concerns, please feel free to contact us here .
*Rough stones are not available. There are also some stones that cannot be used.

*We try to make sure that the colors in the photos are the same as the real thing, but the colors may look slightly different from the real thing depending on the lighting at the time of shooting and the monitor environment you are using. In addition, some photos may be taken using penlights.

*Click here for information on scratches, chips, treatments, and inclusions.

*For other frequently asked questions, please click here .


karatz_item_id: 12549305