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Sapphire is a famous gemstone that needs no introduction. Mineralogically, it is corundum, the same as ruby, but any corundum that is not red is called sapphire. It is known for its diverse color variations, including blue, as well as pink, yellow, and green. This is a sapphire from Windsor, Tanzania. Windsor sapphire is not widely circulated in the market and is one of the origins known among gemstone collectors. Tanzania is also known as one of the world's leading gemstone-producing regions, yielding many beautiful stones such as spinel and tanzanite, and it also produces attractive sapphire crystals.
・Type: Loose stone (natural)
・Stone name: Windsor Sapphire from Tanzania
・Weight: 0.272ct
・Size: 3.9 x 3.2 mm
・Shape: Oval cut
・Scratches/Chips: S
・Inclusions: S
・Notes: Usually heated.
*While sapphires are generally heated, this specific stone could not be definitively identified as heated during standard inspection using a microscope or similar tools. A high-level inspection at a gemological laboratory is required to definitively determine whether a stone is heated or unheated.
・Accessories: Karatz quality guarantee, loose stone case (or a clear zip-top bag if it does not fit)
▷ Jewelry customization available
If you would like to have this stone made into jewelry, please order it along with your desired setting from the link below.
・[Select from stone] Simple order
・[Select from stone] Semi-order
*If you would like an image of the stone set in a frame, wish to discuss a full custom order, or have any other questions, please feel free to contact us here.
*Rough stones are not eligible. Some stones may also not be eligible for processing.
* We strive to ensure that the colors in our photos are as accurate as possible, but they may appear slightly different from the actual product due to lighting during photography or your monitor settings. Additionally, some photos may be taken using a penlight.
* For products featuring UV fluorescence photos, we use a 365nm wavelength blacklight for photography. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to see. The blacklight we use can be found here.
* For information regarding scratches, chips, treatments, and inclusions, please see here.
* For other frequently asked questions, please see here.
karatz_item_id: 12564140
・Type: Loose stone (natural)
・Stone name: Windsor Sapphire from Tanzania
・Weight: 0.272ct
・Size: 3.9 x 3.2 mm
・Shape: Oval cut
・Scratches/Chips: S
・Inclusions: S
・Notes: Usually heated.
*While sapphires are generally heated, this specific stone could not be definitively identified as heated during standard inspection using a microscope or similar tools. A high-level inspection at a gemological laboratory is required to definitively determine whether a stone is heated or unheated.
・Accessories: Karatz quality guarantee, loose stone case (or a clear zip-top bag if it does not fit)
▷ Jewelry customization available
If you would like to have this stone made into jewelry, please order it along with your desired setting from the link below.
・[Select from stone] Simple order
・[Select from stone] Semi-order
*If you would like an image of the stone set in a frame, wish to discuss a full custom order, or have any other questions, please feel free to contact us here.
*Rough stones are not eligible. Some stones may also not be eligible for processing.
* We strive to ensure that the colors in our photos are as accurate as possible, but they may appear slightly different from the actual product due to lighting during photography or your monitor settings. Additionally, some photos may be taken using a penlight.
* For products featuring UV fluorescence photos, we use a 365nm wavelength blacklight for photography. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to see. The blacklight we use can be found here.
* For information regarding scratches, chips, treatments, and inclusions, please see here.
* For other frequently asked questions, please see here.
karatz_item_id: 12564140
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Tanzania Winza Sapphire 0.272ct Loose Stone
Sale price¥8,800
Regular price









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