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Paraiba tourmaline is captivating for its exquisite color, distinct from both the blue of the sea and the blue of the sky. In Japan, it is defined as "copper-bearing blue to green tourmaline (regardless of origin)." It is a gemstone that continues to enjoy enduring popularity.
This is a piece of rough Paraiba tourmaline from the São José da Batalha mine (old mine) in Paraíba State, Brazil. São José da Batalha is known as the birthplace of Paraiba tourmaline. This is a crystal specimen with matrix, unearthed from that historic mine. A vivid, Paraiba-like blue-green columnar crystal extends from the white to translucent matrix. The characteristic vertical striations of tourmaline can be seen on the crystal surface, allowing you to closely observe the form of the crystal as it appears in its raw state.
・Type: Rough stone
・Stone Name: Brazilian Paraiba Tourmaline (Paraiba Tourmaline)
・Weight: 20.343ct
・Size: 30.0×19.3mm
・Scratches/Chips: -
・Inclusions: -
・Note: Usually heated.
*Paraiba tourmaline is a gemstone that is generally heated. Furthermore, as it is difficult for current gemological technology to distinguish between heated and unheated stones, we state the treatment as "Usually heated."
・Accessories: KARATZ Quality Guarantee, loose stone case (or a clear zip-lock bag if the item does not fit)
※ While we strive to ensure the colors in the photos match the actual item, please note that they may appear slightly different depending on lighting conditions at the time of photography or your monitor settings. Some photos may also be taken using a penlight.
※ For products featuring UV fluorescence photos, they are taken using a 365nm wavelength blacklight. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to confirm. The blacklight used in our shop 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: 12564289
・Type: Rough stone
・Stone Name: Brazilian Paraiba Tourmaline (Paraiba Tourmaline)
・Weight: 20.343ct
・Size: 30.0×19.3mm
・Scratches/Chips: -
・Inclusions: -
・Note: Usually heated.
*Paraiba tourmaline is a gemstone that is generally heated. Furthermore, as it is difficult for current gemological technology to distinguish between heated and unheated stones, we state the treatment as "Usually heated."
・Accessories: KARATZ Quality Guarantee, loose stone case (or a clear zip-lock bag if the item does not fit)
※ While we strive to ensure the colors in the photos match the actual item, please note that they may appear slightly different depending on lighting conditions at the time of photography or your monitor settings. Some photos may also be taken using a penlight.
※ For products featuring UV fluorescence photos, they are taken using a 365nm wavelength blacklight. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weaker or be difficult to confirm. The blacklight used in our shop 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: 12564289
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【9/5 22:00 Release】 Brazilian Paraiba Tourmaline 20.343ct Rough Stone
Sale price¥15,800
Regular price



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