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This beautiful blue. This hard luster with a Mohs hardness of 8. "Blue spinel" is not synonymous with "cobalt spinel"; only those that have been confirmed to contain a cobalt band are called "cobalt spinel."
This is a high-quality cobalt spinel from Tanzania with high clarity and high saturation. It comes with an identification report.
・Type: Loose (Natural Stone)
・Stone Name: Cobalt Spinel
・Weight: 0.094ct
・Size: 2.5×2.5mm
・Shape: Round cut
・Scratches/Chips: S
・Inclusions: S
・Remarks: ---
・Accessories: Identification report (JTL (Jewel Trading Laboratory)), loose stone case (or a clear zip-lock bag if it does not fit)
※ We strive to ensure that the photos reflect the actual colors as closely as possible, but they may appear slightly different from the real item due to lighting conditions during photography or your monitor's settings. Some photos may also be taken using a penlight.
※ For products featuring UV fluorescence photos, they are taken using a black light with a wavelength of 365nm. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to confirm. The black light we use is available here.
※ For details on scratches, chips, treatments, and inclusions, please see here.
※ For other frequently asked questions, please see here.
karatz_item_id: 12564624
This is a high-quality cobalt spinel from Tanzania with high clarity and high saturation. It comes with an identification report.
・Type: Loose (Natural Stone)
・Stone Name: Cobalt Spinel
・Weight: 0.094ct
・Size: 2.5×2.5mm
・Shape: Round cut
・Scratches/Chips: S
・Inclusions: S
・Remarks: ---
・Accessories: Identification report (JTL (Jewel Trading Laboratory)), loose stone case (or a clear zip-lock bag if it does not fit)
※ We strive to ensure that the photos reflect the actual colors as closely as possible, but they may appear slightly different from the real item due to lighting conditions during photography or your monitor's settings. Some photos may also be taken using a penlight.
※ For products featuring UV fluorescence photos, they are taken using a black light with a wavelength of 365nm. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to confirm. The black light we use is available here.
※ For details on scratches, chips, treatments, and inclusions, please see here.
※ For other frequently asked questions, please see here.
karatz_item_id: 12564624
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[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone
Sale price¥47,800
Regular price



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