DESCRIPTION Item description: one loose stone Species: Tourmaline, natural Variety: Paraiba Tourmaline, (cuprian elbaite) Weight: 5.18 ct. Shape: Oval Cutting Style: Modified Brilliant Cut Cut grade: Good Transparency: Transparent Measurements: 13.18 x 9.36 x 5.90 mm. Treatment: Minor clarity enhanced (Oiled) Hardness: 7-7.5 Mohs scale Refractive index: 1.603-1655 Comments: This copper and manganese bearing tourmaline may be called "Paraiba tourmaline" in the trade. Certificate: I.G.E. (Instituto Gemologico Español) D-12855 NOTES - All gems are sent with a certificate. - The origins are not certified by a laboratory, they are my gemological opinion. - The photos are taken at more than 10X, with macro lens, so there are inclusions that are not really visible to the naked eye. - The pictures aren't true to scale, which is why we give you the exact measurements of the stone so that you can get a good idea of the size. - Colours may look different depending on your screen settings, I try to make them as real as possible SHIPPING. Up to € 100 - Correos - (2-3 weeks) More than € 100 - Zeleris Air (DHL) - (3-7 days) Customs charges paid by the buyer Canarias and Baleares only by Correos #CYBER2023BUY