Emerald Diamond Cosma Ring – Modern, Artistic, and Timeless

by Katkim

Emerald Diamond Cosma Ring in polished 18 k gold, featuring a sleek emerald‑cut diamond bezel set in an octagonal silhouette
Close-up of emerald‑cut diamond framed within a clean octagonal bezel on the Cosma Ring, available in yellow, white, rose gold or platinum
Modern Cosma engagement ring with emerald‑cut diamond bezel set in 18 k rose gold, crafted by hand in Los Angeles
Handcrafted emerald‑cut diamond Cosma Ring in platinum with minimalist octagonal bezel—emulates the stone’s silhouette
Stone:
Ideal cut lab grown diamond
Total Carat:
1 ct
Color:
G
Clarity:
VS1
Material:
18k Yellow Gold
Made In:
USA
Ring story · Wearable art

An emerald cut, set like
a piece of sculpture.

The Emerald Diamond Cosma Ring by KATKIM cradles a luminous 1-carat emerald-cut lab diamond in a sleek, sculptural bezel, in glowing 18k gold. Handcrafted in Los Angeles, it’s the kind of ring that reads as art as much as adornment.

Who she is

For the woman who wants
a ring like a work of art.

This is the one I reach for when someone loves clean, architectural design — she notices lines and proportion, and she wants a ring that feels considered rather than conventional.

She’s after quiet confidence, not flash: an emerald cut and a sculptural bezel say “I have taste” far more than a big, busy setting ever could.

The kind of ring that makes people lean in for a closer look — and then keep looking.
What sets it apart

Three things that make it
feel like art.

01

A luminous emerald-cut diamond

At the centre is a 1-carat ideal-cut lab-grown emerald diamond (G colour, VS1) — the emerald cut’s long, clean facets give a sophisticated, hall-of-mirrors clarity rather than fiery sparkle. Understated and elegant.
Why the bezel
A bezel doesn’t just look modern — it protects the stone and keeps the profile smooth, making this striking ring genuinely everyday-friendly.
02

A sculptural bezel setting

A sleek bezel wraps the stone, mirroring its clean lines and giving the ring its architectural, modern character. It also sits smooth and secure — beauty and practicality in one.
03

Handcrafted in Los Angeles

The Cosma is handcrafted with care in LA, available in your choice of glowing 18k gold or platinum. It blends architectural strength with graceful elegance in a way that feels both modern and timeless.
The maker

About KATKIM.

KATKIM is a Los Angeles fine-jewellery house known for sculptural, architectural designs with a delicate, modern edge. Their pieces are handcrafted and unmistakably contemporary — and the Cosma, with its clean emerald cut and sleek bezel, is a signature example of that aesthetic.

In real life

Architectural, and genuinely
easy to wear.

The bezel setting is a quiet hero here — it keeps the emerald-cut diamond secure and the profile smooth, so there’s nothing to snag day to day. It stacks cleanly with a wedding band, and lab-grown sourcing means it’s a conscientious choice too. A statement piece you can genuinely live in.

Common questions

FAQ — what people
actually ask me.

Why choose an emerald-cut diamond?

The emerald cut has long, clean step-cut facets that give an elegant, understated sparkle and a beautifully clear look. It’s a sophisticated, architectural alternative to the round brilliant.

Is a bezel setting practical?

Very. A bezel surrounds and protects the stone, keeping it secure and the ring snag-free — ideal for everyday wear and active hands, while looking sleek and modern.

Are lab-grown diamonds real?

Yes — lab-grown diamonds are chemically and optically identical to mined ones. The Cosma’s 1-carat lab diamond offers bright, clean beauty with a more approachable price and lighter footprint.

Can I choose the metal?

You can — the Cosma comes in 18k gold or platinum, so you can tailor it to her style and skin tone.

Not sure if this is
the one?

Tell me about her — her profession, her life, her taste. I’ll personally curate 10 rings chosen around your brief.

Get a personal curation →