11.57 ct Square Emerald Cut Emerald, GRS, Colombia Minor oil

11.57 ct Emerald, square emerald cut, from Colombia. Treatment: Minor oil. Clarity enhancement graded minor, a level widely accepted for fine emerald. Colombia is the classic source of fine emerald, valued for its pure, slightly bluish green. GRS report GRS2025-091566. Measurements: 14.90 × 14.19 × 9.10 mm. Our grading: gem quality vivid (muzo, old mine) green. Stock number CS-0704. The video on this page was filmed in our office, unedited and unfiltered. Approved trade buyers can sign in on this page for pricing, or WhatsApp or email us about this stone. Viewings by appointment in Toronto, Hong Kong, Bangkok and Dubai.

Muzo green, in its colour grade, is the warm, intense green associated with Colombia’s Muzo mine. Its laboratory report is from GRS (GemResearch Swisslab), a Swiss laboratory widely used for coloured stones. Its length-to-width ratio is 1.05, close to square. A statement stone for a signature piece, or for a collection.

More like this: Colombian Emeralds · Loose Emeralds · Stone search

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Further reading: Reading a GRS Report: Pigeon's Blood, Royal Blue, Vivid and the Comments Line · Rubies, Sapphires and Emeralds: Origin, Treatment and Value