4.51ct Emerald Cut Pink and Green Bi-Colour Tourmaline

Bi-colour tourmaline represents a geological phenomenon so rare it borders on the miraculous — a single crystal that shifted its chemical composition mid-growth, producing two distinct, harmonious hues within one stone. This 4.51 cts Bi-Colour Tourmaline of Pink and Green moderately strong hue from Brazil was selected for the Skyjems Archive not as an afterthought, but as a deliberate acquisition. It is entirely unheated and untreated — a distinction that places it in the top fraction of the global Bi-Colour Tourmaline supply and is the single most important value driver in the collector market. Brazil's geological diversity — from Minas Gerais to the Amazon basin — has made it the world's most prolific producer of collector gemstones.

• Species: Natural Bi-Colour Tourmaline
• Weight: 4.51 cts
• Dimensions: 12 x 8.64 x 4.82 mm
• Shape & Cut: Emerald Cut, Step Cut
• Color & Saturation: Pink and Green / Medium Light / Moderately Strong
• Clarity & Transparency: Eye Clean
• Treatment: None / Unheated & Untreated
• Origin: Brazil
• Archive Reference: TR0132