What Is Aquamarine? Color, Meaning & the March Birthstone
A Clear Water-Blue that Mirrors the Sea — Aquamarine
Color · Meaning · March Birthstone · Collection

A translucent, clear water-blue. Aquamarine belongs to the beryl family — like emerald and morganite — and its name comes from the Latin "aqua marina," meaning sea water. From its meaning as a March birthstone to its natural unheated color and the collection itself, here is an honest introduction.
See it in motion
What is Aquamarine
A member of the beryl family, in clear water-blue
Aquamarine belongs to the same beryl family as emerald (green) and morganite (pink). Traces of iron give it a soft water-blue. Highly transparent, it glints cool and clear in the light, and at Mohs hardness 7.5–8 it is well suited to everyday wear.

The Story of Its Name
A stone meaning "sea water"
The name aquamarine comes from the Latin "aqua marina" (sea water). For its clear water-blue, it was long treasured by sailors as a protective charm on their voyages. A pure blue that calls the sea to mind — one that has drawn admirers across the ages.

On the Color, Honestly
This water-blue is a natural, unheated color
Most aquamarine on the market is heated to reduce yellow or green tones and bring out a bluer color — a common and stable method. SMUK's aquamarine, on the other hand, is unheated: we deliver the soft, natural water-blue exactly as the stone holds it, including the subtle variation only nature can give.

We believe in sharing the presence or absence of treatments, and the story of each stone, openly. We hope that knowing a stone's background lets you wear it with confidence, for a long time to come.
Meaning & Symbolism
A stone of happiness and composure
With its clear water-blue, aquamarine has long been cherished as a stone of "happiness," "composure," and "courage." As a color that speaks to a calm, steady heart — like the sea — it is chosen as a gift to oneself as much as to someone dear.
Stone Data
Aquamarine is the birthstone for March — its clear water-blue is a favourite gift for those born in March.
Birthstone March
Mineral Beryl
Color Clear water-blue
Treatment Unheated
Origin Brazil
The Aquamarine Collection
A collection pairing unheated aquamarine with a base of sterling silver 925 finished in rhodium plating. The clear water-blue is set in simple designs, easy to wear every day.

Crowdfunded on Makuake
This collection ran a pre-order campaign on the Japanese crowdfunding platform Makuake, where it received the support of many backers. Thank you to everyone who supported us — the collection is now available on our official site.
View the Makuake project →





Let a clear water-blue be a quiet accent to your days.
May its pure color stay softly by your side.
- Is that natural stone real? — Identification & the truth about treatments
- A ¥3,000 vs ¥8,000 earring — where the difference lies
- Plating guide — rhodium, 18K, 14K white gold & vermeil
- Jewelry gift guide — by price and occasion
- The choice of silver 925 — jewelry that lives with nature
- Natural stone jewelry guide — knowing material & meaning
- Metal allergy & jewelry materials — a correct-knowledge guide