Stone file · Johya

JOH-02026-CD31

Colombian Emerald, 4.87 ct

Natural Colombian emerald, traceability file

Technical sheet

Reference	JOH-02026-CD31
Origin	Colombia
Weight	4.87 ct
Color	Intense green
Shape & cut	Emerald
Treatment	Minor (liquid)
Comments	Natural stone, no solid resin treatment (perma)
Dimensions	11.06 x 10.71 x 6.58 mm
Certificate	Bellerophon Gemlab · no. A19905

This file is a traceability document. It states no price and does not constitute an offer of sale.

The stone's journey

Rough stone

Crystal bought hand to hand on the Muzo marketplace, in Boyacá. At this stage nothing is settled: the lamp hints at the color and the clarity, only the cut will tell what the stone can give. We selected it for the density of its green and the cleanness of its material, rare at such a size.

Muzo, Colombia · Purchased 24 June 2026

Cutting

The crystal travels down to Bogotá, entrusted to Christian, our lapidary. He opts for a square step cut with cut corners: it is the one that best respects the volume of the rough and circulates the light without hardening the color. Some material is always lost at this stage; that is the price of a properly proportioned stone.

Bogotá, Colombia · Cut by Christian, July 2026

Cut stone

4.89 ct out of the workshop, an intense green served by a lively brilliance. The stone is reweighed, photographed without retouching, then prepared for its departure to France. Its oil treatment, minor oil, is declared on its product page as on its certificate.

Muzo, Colombia · Ready for export, late July 2026

Certificat gemmologique indépendant · Bellerophon Gemlab

Certificat gemmologique Bellerophon Gemlab n° A19905

Rapport n° A19905

Declared treatment : Minor (liquid)

View the certificate (PDF)