What Is Ametrine? Bicolor Quartz
Two Colors in One Crystal — Ametrine
History · Meaning · Bicolor Quartz · Collection
Within a single crystal, purple (amethyst) and yellow (citrine) melt into one. Ametrine is a rare bicolor quartz that holds two colors at once — and two birthstones, February and November. From the secret of its color to the legend of Bolivia's Anahí mine, here is the story of ametrine.
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What Is Ametrine
Two colors in a single crystal
Ametrine is a bicolor quartz in which amethyst (purple) and citrine (yellow) coexist within one crystal. Though it is a single quartz, slight differences in temperature and in the state of iron as the crystal grows cause purple and yellow to appear divided within the same stone.
The conditions for these two colors to form naturally are very limited, and natural, unheated ametrine is a rare stone seldom seen on the market. Its hardness is 7 on the Mohs scale. While much of the material sold today is artificially produced, natural bicolor stones differ in how the colors divide from one piece to the next — no two are ever exactly alike.
The Name & the Anahí Mine
A Bolivian stone that carries a princess's name
The name "Ametrine" combines Amethyst and Citrine. Its main source is the Anahí mine in Bolivia, South America.
A story from around the 17th century has been passed down. A Spanish explorer is said to have married Anahí, a princess of an indigenous people, and received the mine as her dowry. Later, by presenting ametrine to his queen back home, the stone became known in Europe. The mine's name, "Anahí," is still spoken of alongside the stone today.
Meaning & Symbolism
Opposing colors, brought into harmony
Ametrine's stone meanings are "harmony" and "stability." From the way two entirely different colors — purple and yellow — melt together within one crystal, it is said to symbolize balance, calm, and the joining of two things.
As a stone that holds the meanings of both amethyst and citrine, it has been cherished as a special piece — one that plays two roles at once.
Two Birthstones
Ametrine holds two birthstones — amethyst (February) and citrine (November). A rare stone that suits those born in either month, it is also chosen for anniversaries shared by two people, or as a gift for someone who cherishes both months.
Birthstone February (Amethyst) · November (Citrine)
Color Purple (Amethyst) × Yellow (Citrine) bicolor
The SMUK Ametrine Collection
A collection pairing natural, unheated ametrine with a base of Italian sterling silver 925 finished with rhodium plating. This time, we took on our first large-stone design. Every stone is over 1.5ct, and the largest — the heart cut — is 6.7ct. Large cuts are rarely used for rare ametrine, but we chose them intentionally so you can fully enjoy the gradation of purple and yellow.
The necklaces are now on pre-order on Makuake at a limited special price.
General release on our official site is planned for early December 2026.
Octagon
Ametrine Necklace
Approx. 8×6mm — a clean, upright form
the line between purple and yellow, beautifully shown
Asscher
Ametrine Necklace
Approx. 7.5mm — a square step cut
with clear, layered brilliance
Heart
Ametrine Necklace
Approx. 13mm · 6.7ct — the large centerpiece
a lovely shape with real presence
Octagon
Ametrine Stud Earrings
Sterling Silver 925 · Rhodium Plated
Stud type · available on the official site
A stone where two colors — purple and yellow — come together in harmony,
as a quiet accent to your everyday. May the SMUK Ametrine Collection accompany your days.
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- Plating Guide — Rhodium, 18K, 14K White Gold & Vermeil
- Jewelry Gift Guide — Choose by Price & Occasion
- Why Silver 925 — Jewelry That Lives With Nature
- Natural Stone Jewelry Guide — Materials & Meanings
- Metal Allergy & Jewelry Materials — What to Know
