[Sales start August 27, 10 PM JST] Tanzanian Sapphire 0.622 ct Loose (Color Change Sapphire) with Appraisal Report

Sapphire, a famous and widely known gemstone. While its mineral is corundum, just like ruby, all corundum that is not red is called sapphire, resulting in a wide variety of colors. With a hardness of 9, sapphire is second only to diamond in hardness. Its high hardness, toughness, and stability make it an easy gemstone to handle.
This particular sapphire is from Tanzania and was acquired as unheated, but no unheated inspection has been performed. It comes with a鑑別書 (gem identification report). Please note that the report may state "usually heated," which does not mean that heat treatment has been confirmed, but rather is an expression used when no inspection has been performed to guarantee it is unheated. For more details, please see "Gemstones that are generally heat-treated." This type exhibits color change, allowing you to enjoy different hues. It comes with a gem identification report.

・Type: Loose stone (natural stone)
・Gemstone name: Sapphire
・Weight: 0.622ct
・Size: 4.9×4.2㎜
・Shape: Emerald cut
・Scratches/Chips: S
・Inclusions: A+
・Remarks: Usually heated.
　*While sapphires are generally heat-treated, this product was not determined to be heated during standard inspections such as with a microscope. Advanced testing by a gemological laboratory is required to definitively determine whether it is heated or unheated.
・Accessories: Gem identification report (JTL (Jewel Trading Laboratory)), loose stone case (clear zip case if it doesn't fit)

▷Jewelry processing available
If you would like jewelry processing, please order with your desired setting from the link below.
・【Choose your stone】Simple order
・【Choose your stone】Semi-order
※If you would like an image of the stone set in a frame, want to discuss a full custom order, or have any other questions, please feel free to contact us here.
※Rough stones are not eligible. Also, some stones may not be eligible.

※ We strive to make sure the photos are the same color as the actual product, but due to the lighting conditions during photography, the monitor environment you are using, etc., the actual product may look slightly different. Also, some photos may be taken using a penlight.

※ For products with UV fluorescence photos, they are taken using a 365nm blacklight. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weak or be difficult to confirm. The blacklight we use can be found here.

※ For information on scratches, chips, treatments, and inclusions, please see here.

※ For other frequently asked questions, please see here.


karatz_item_id: 12564195