One stone, two moods. The heart at the center of this alexandrite promise ring is a genuine color-shift gem — cool teal-green in daylight, then a warm purple-red under lamplight and candle glow. Because the heart is faceted and openly set in solid 925 sterling silver with a rhodium finish, that famous shift is easy to see for yourself, flanked by simulated diamond accents that keep the whole ring sparkling.
Color-shift alexandrite
Heart cut center
Solid 925 sterling silver
Rhodium finish
June birthstone
Free velvet gift box
A heart that shifts with the light
Hold the ring near a window and the heart reads teal to blue-green; step into warm evening light and it warms to violet and raspberry-purple. That living, weather-like change is what makes alexandrite one of the most captivating stones you can wear, and the open heart cut was chosen precisely to let it perform. If you love a gem that answers to its surroundings, you’ll find kindred designs across our alexandrite engagement rings and the wider alexandrite jewelry collection. Curious how the effect works? Our guide to whether synthetic alexandrite changes color explains the science in plain language.
The lab-grown alexandrite
The 7mm heart is a genuine lab-grown alexandrite — the same chrysoberyl mineral as mined alexandrite, with the identical chromium chemistry that creates the color shift, simply grown in a lab rather than pulled from the earth. That means a cleaner, brighter, more affordable stone with none of the ethical questions of natural mining. If you’re weighing your options, our explainer on lab-grown versus natural alexandrite lays out exactly what matters. For couples shopping together, it also pairs beautifully with our alexandrite couples rings.
Simulated diamond accents
A row of simulated diamonds frames the heart, adding a crisp, bright flash that makes the color-shift center look even richer. It is a smart, budget-friendly way to bring classic sparkle to the design, and the cubic zirconia stones are cut for maximum fire. Prefer moissanite or lab-grown diamond accents instead? Message us — most of our designs can be upgraded to order.
Solid sterling silver with a rhodium finish
The band is crafted in solid 925 sterling silver and finished with rhodium, the same bright precious metal used on fine white gold. That rhodium layer gives the ring a mirror-white luster and adds a protective shield that helps resist tarnish and everyday scratches, so it keeps looking freshly polished. It is the detail that lets sterling silver wear like something far more expensive.
What a heart alexandrite promise means
A heart says devotion; a color-shift stone says a love that adapts and endures through changing seasons. Together they make this a natural choice for a promise, an anniversary, or a June birthday. Alexandrite is one of June’s celebrated birthstones, and its dual nature has long symbolized balance and transformation — the perfect emblem for two people growing together. If you are torn between gems, you may enjoy our comparison of alexandrite versus sapphire.
Specifications
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Metal Solid 925 sterling silver with rhodium finish
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Center stone Lab-grown alexandrite (color-shift)
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Color shift Teal-green in daylight to purple-red in warm light
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Cut Heart, 7.0 x 7.0 mm (approx. 1.5 ct)
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Accents Simulated diamonds (cubic zirconia)
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Hardness 8.5 on the Mohs scale
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Style Promise, anniversary or June birthstone ring
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Personalization Optional engraving (up to 16 characters)
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Sourcing Ethically sourced, conflict-free stones
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Included Free luxury velvet gift box & lifetime warranty
Sizing & care
Choose your size at checkout. If you are between sizes or unsure, we are happy to help — and if the fit isn’t quite right, resizing is available and starts from a modest fee. To keep the color shift vivid and the rhodium finish bright, remove the ring before showering, swimming or applying lotions, and store it in the velvet box when not worn. A soft, dry cloth restores the shine beautifully.
Frequently asked questions
Does the alexandrite really change color?
Yes. Because the heart is faceted and openly set, the shift is clearly visible — teal-green in daylight moving to purple-red under warm indoor or candle light. Move between light sources and you will watch it change.
What causes the color shift?
Trace chromium inside the alexandrite absorbs light differently depending on the source. Daylight is rich in blue, so the stone reads green; warm light is rich in red, so it turns violet and purple. It is a genuine optical effect, not a coating.
Is the alexandrite genuine?
Yes, it is 100% genuine lab-grown alexandrite — chemically identical to mined alexandrite, but ethically created and far more attainable. Only the small accent stones are cubic zirconia.
What is the difference between a promise and engagement ring?
A promise ring marks commitment and intention at any stage of a relationship, while an engagement ring signals a formal proposal. This design works beautifully as either — many customers choose it as a meaningful promise or anniversary ring.
What are the accent stones?
They are simulated diamonds (cubic zirconia), cut for bright, crisp sparkle that frames the color-shift heart. If you would prefer moissanite or lab-grown diamond accents, reach out and we can craft it to order.
What metal is the ring made from?
Solid 925 sterling silver, finished with rhodium for a bright white luster and extra protection against tarnish and scratches.
What does the rhodium finish do?
Rhodium is the same precious metal used to finish fine white gold. It gives the silver a mirror-bright shine and adds a protective layer that helps the ring stay looking freshly polished.
Will sterling silver turn my finger green?
No. Genuine 925 sterling silver with a rhodium finish will not turn your skin green. Green marks come from low-quality or fake metals, never from real sterling silver.
Is it durable enough for daily wear?
Yes. Alexandrite sits around 8.5 on the Mohs scale, making it well suited to everyday wear with normal care. Avoid hard knocks and remove the ring for rough activities to keep it pristine.
Can it be engraved?
Yes. You can add a personal engraving of up to 16 characters at checkout — a date, initials or a short message. Engraved pieces are final sale, so please double-check spelling.
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.
Is alexandrite a June birthstone?
Yes. Alexandrite is one of the celebrated birthstones for June, which makes this ring an especially thoughtful gift for a June birthday, alongside anniversaries and promises.
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 as a keepsake or to mark your promise.
