The Johya notebook · The guide

All about emerald

Price, cut, inclusions, treatments, symbolism: the questions to ask before choosing an emerald, and our answers as a dealer.

Emerald-cut Colombian emerald resting on a white glove
Johya, Colombian emeralds

One article per question.

The guide's articles

01 / Before buying

Judging an emerald

Color · Clarity · Cut · Treatment

Our criteria

What we look at in a stone.

The criteria we apply before buying an emerald, from color to degree of treatment, and what a certificate lets you verify.

Read how to judge an emerald

Understand before choosing

What to know before buying an emerald

This blog gathers what you need to know before buying an emerald, written from the stones that pass through our hands. You will find what drives the price of a stone, what changes with geographic origin from one deposit to the next, and what the treatments stated on a laboratory report actually cover. To assess a stone before buying, our criteria are set out in how to judge an emerald.

The symbolism and the history of the gem have their place too, from the emerald anniversary to the May birthstone. To see the stones themselves, the collection is kept current, each listing carrying its exact weight, its dimensions and the degree of treatment recorded by the laboratory.

Articles by topic

From the guide to the stones.

The Colombian emeralds available now, each with its exact weight, its dimensions and its degree of treatment.

See our emeralds