A little moon that answers to the light. This alexandrite crescent moon engagement ring cradles an oval lab-grown alexandrite that shifts from cool blue-green in daylight to warm purple-red by lamplight — a color-change you can actually watch happen. A slender crescent of luminous rainbow moonstone curves alongside it, set in warm 14K rose gold vermeil for a celestial, one-of-a-kind piece made to be worn every day.
Color-change alexandrite
Lab-grown center stone
Rainbow moonstone accents
Crescent moon design
14K rose gold vermeil
Free velvet gift box
A color that changes before your eyes
The heart of this ring is its alexandrite — and the reason people fall for it is simple: the stone genuinely changes color with the light around it. Step outside into daylight and it reads a cool blue-green; move indoors under a lamp or candle and it glows a soft purple-red. It is a live, dynamic effect, not a photo trick, and it makes the ring feel a little different every hour of the day. If you love stones with a story, you will find kindred pieces throughout our alexandrite engagement rings collection. For a plain-English look at how the shift works, our guide on whether synthetic alexandrite changes color is a great primer.
The celestial crescent moon setting
Rather than a classic solitaire, this design frames the alexandrite against a curving crescent of rainbow moonstone, so the center stone appears to rise like a tiny moon over a shimmering horizon. Moonstone brings its own quiet magic — that floating, milky glow called adularescence that flickers blue and silver as your hand moves. The result is a soft, romantic, slightly witchy silhouette that suits anyone drawn to celestial and nature-inspired engagement rings. It wears just as beautifully as an everyday statement piece from our wider alexandrite jewelry range.
The lab-grown alexandrite
This is real lab-grown alexandrite — genuine chrysoberyl with the same color-change chromium chemistry and the same 8.5 Mohs hardness as mined alexandrite, simply created in a controlled lab rather than dug from the earth. Natural alexandrite is one of the rarest gems in the world, so lab-grown is what makes it possible to wear a stone this size and this vivid as an everyday ring rather than a locked-away rarity. If you want the full picture, our article on lab-grown vs natural alexandrite lays it out honestly.
What alexandrite symbolizes
Discovered in Russia in the 1830s and named for Tsar Alexander II, alexandrite has long been read as a stone of transformation, balance and the ability to adapt — fitting symbolism for a partnership that grows and shifts over the years. It is also the modern June birthstone (alongside pearl and moonstone), which makes this ring a heartfelt birthday, anniversary or promise gift. Curious how it stacks up against other colored stones? See our comparison of alexandrite vs sapphire.
Specifications
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Metal 14K rose gold vermeil over sterling silver 925
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Center stone Lab-grown alexandrite (color-change)
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Center cut Oval, 6.0 x 8.0 mm (approx. 1.4 ct)
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Color change Blue-green in daylight, purple-red in warm light
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Hardness 8.5 on the Mohs scale
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Accents Rainbow moonstone crescent
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Band width Approx. 1.7 mm
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Design Celestial crescent moon
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Birthstone June (alexandrite)
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Sourcing Ethically sourced, conflict-free stones
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Included Free luxury velvet gift box & lifetime warranty
Aquamarise vermeil is real gold over sterling silver 925 — the rich, golden look you love, at a price that makes it easy to say yes. Keep it luminous with a little care: remove before showering, swimming, or exercise, avoid contact with lotions and fragrance, and store dry between wears. Want gold all the way through? The same design is also available in solid gold.
Sizing & care
Choose your size at checkout. If you are between sizes or unsure, reach out and we are happy to help — and if the fit is not quite right, resizing is available and starts from a modest fee. Because moonstone is a little softer than the alexandrite, remove the ring before showering, swimming or exercise, keep it away from lotions and fragrance, and store it dry in its velvet box between wears. A soft, dry cloth brings back the shine beautifully.
Frequently asked questions
Does the alexandrite really change color?
Yes. It reads cool blue-green in daylight and shifts to a warm purple-red under lamplight or candlelight. The change is a real optical effect from the stone's chromium chemistry, not a coating, so you will see it move as your surroundings change.
Is the alexandrite real?
Yes — it is genuine lab-grown alexandrite, real chrysoberyl with the same chemistry, hardness and color-change behavior as mined alexandrite. It is grown in a controlled lab rather than mined, which is what makes a stone this size affordable.
What is rose gold vermeil?
Rose gold vermeil is real gold over sterling silver 925 — it gives you the warm, luminous look of rose gold at an easier price than a solid-gold piece. If you would like gold all the way through, the same design is also available in solid gold; just reach out.
What are the accent stones?
A curving crescent of rainbow moonstone frames the center. Moonstone has a soft, floating glow called adularescence that flickers blue and silver as the light moves, adding a celestial, romantic feel alongside the color-change alexandrite.
What colors will my stone show?
Expect cool blue-green in daylight and fluorescent light, and warm purple-red under incandescent bulbs or candlelight. The exact reading depends on your lighting, so the ring looks a little different from room to room — which is the whole charm of alexandrite.
How big is the center stone?
The oval alexandrite measures 6.0 x 8.0 mm, roughly 1.4 carats, so it sits as a clear focal point above the moonstone crescent while staying comfortable for everyday wear.
Is this a good June birthstone gift?
Absolutely. Alexandrite is the modern June birthstone, and moonstone is a traditional June stone too, so this ring is doubly meaningful as a June birthday, anniversary or promise gift.
How durable is it for daily wear?
The alexandrite is very hard at 8.5 on the Mohs scale and handles daily wear well. Moonstone is softer, so treat the ring gently: avoid hard knocks and remove it for rough activities to keep both stones looking their best.
How should I care for the ring?
Remove it before showering, swimming or exercise, keep it away from lotions and fragrance, and store it dry in its velvet box between wears. Clean gently with a soft, dry cloth to keep the rose gold and stones luminous.
What size should I order?
Select your ring size at checkout. If you are unsure or between sizes, contact us for guidance. Resizing is available and starts from a modest fee.
Are the stones ethically sourced?
Yes. The lab-grown alexandrite has no mining footprint, and all of our stones are ethically sourced and conflict-free, so you can wear the ring with complete peace of mind.
Does it arrive gift-ready?
Every order ships in a free luxury velvet gift box and is backed by our lifetime warranty — ready to give for a proposal, birthday or anniversary.
Can I see more alexandrite designs?
Of course. Explore the full alexandrite engagement rings collection and our matching alexandrite couples rings to find the pairing that speaks to you.
