A round brilliant alexandrite that cannot decide what color it is, held inside the hexagonal halo this ring is named for. The center shifts across purple, teal, and blue as the light around it changes, and the six-sided frame — 10.5 mm across, edged in simulated diamonds — gives that shifting color a hard geometric border to push against. Built on solid 925 sterling silver with a rhodium finish.
Lab-Grown Alexandrite
Round Brilliant, 6.0 mm
Purple / Teal / Blue Shift
Hexagon Halo, 10.5 mm
925 Sterling Silver
Nickel-Free, Hypoallergenic
Purple, Teal, Blue — in the Same Stone
Most color-change stones manage two states. This alexandrite runs a wider range: a cool teal-blue under daylight and bright LEDs, warming through to a distinct purple under incandescent bulbs and candlelight. The stone is not doing anything — it absorbs the green and red parts of the spectrum unevenly, so your eyes read whichever survives in the light you are standing in. A brilliant cut is the right choice here because it bounces light through the maximum volume of stone, which makes the shift more pronounced than a step cut would. Our journal covers the mechanism in does synthetic alexandrite change colors.
Lab-Grown, and Genuinely So
Alexandrite was first identified in the Ural Mountains of Russia in the nineteenth century, and natural material has been scarce ever since — scarce enough that a natural stone at this size would price the ring far out of the range most people are shopping in. This center is lab-grown alexandrite: the same mineral, the same optical behavior, the same 8.5 on the Mohs scale, produced reliably rather than found by luck. Our guide to lab-grown vs natural alexandrite lays out what actually differs, and the alexandrite guide covers what to look for in a color shift.
The Hexagon Halo
A halo does two jobs: it makes a modest center read larger, and it gives the eye a bright border that intensifies the color inside it. Here the halo is hexagonal rather than round, which is the detail that separates this ring from every other halo design — six straight edges around a round stone create a deliberate tension between the geometric frame and the soft circle at its middle. At 10.5 mm across the halo carries real presence on the finger, while the 6.0 mm center stays at an everyday scale. Compare approaches in our halo engagement rings, or see the family in alexandrite engagement rings.
Sterling Silver, Rhodium Finished
The band is solid 925 sterling silver, 2.3 mm on average and comfort fit, with a rhodium finish over it. Rhodium is a platinum-group metal, and finishing sterling with it gives the silver a brighter, whiter luster and an added layer of protection on the surface — a standard we apply across our sterling range. The ring is also nickel-free and hypoallergenic. Read what 925 sterling silver means for the standard in full, and browse more in sterling silver engagement rings.
June's Stone, Vintage Framing
Alexandrite is one of June's birthstones, and the vintage-inspired detailing here — the close-set accent stones, the geometric halo, the slim band — borrows from antique jewelry rather than contemporary minimalism. See what else June has to offer in our June birthstone guide, or browse the wider alexandrite jewelry range.
Specifications
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Center stone Lab-grown alexandrite
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Shape / cut Round, brilliant cut
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Stone size 6.0 mm
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Carat weight Approx. 0.85 ct
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Color shift Purple / teal / blue
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Hardness 8.5 on the Mohs scale
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Halo Approx. 10.5 mm across
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Accent stones Simulated diamonds (CZ)
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Metal Solid 925 sterling silver, rhodium finish
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Band width Approx. 2.3 mm, comfort fit
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Skin safety Nickel-free, hypoallergenic
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Includes Free ring box, free U.S. shipping
Sizing & Care
The ring is made in the size you select, so measure with our ring size guide before ordering, keeping in mind that a comfort-fit band can feel slightly snugger than a flat band of the same nominal size. For care, wipe the ring with a soft, dry cloth after wearing and use a soft brush around the halo where skin oils collect. Keep it away from household cleaners and chlorinated water, and store it dry. Our guide to cleaning sterling silver covers the routine in more detail.
Frequently Asked Questions
Is the sterling silver rhodium finished?
Yes. The solid 925 sterling silver carries a rhodium finish, which gives it a brighter, whiter luster and adds a layer of protection to the surface. Rhodium is a platinum-group metal, and we apply this finish across our sterling range.
Does the alexandrite really change color?
Yes. It shifts across teal and blue under daylight and cool LEDs, then warms toward purple under incandescent light. Nothing about the stone changes; you are seeing how it absorbs different parts of the spectrum.
Is the alexandrite natural or lab-grown?
It is lab-grown alexandrite. Natural alexandrite has been scarce since it was first identified in Russia's Ural Mountains, and a natural stone at this size would price the ring far beyond this range.
How large is the center stone?
The round brilliant alexandrite is 6.0 mm and weighs approximately 0.85 ct. The hexagonal halo around it measures roughly 10.5 mm, so the ring reads considerably larger than the center alone.
What makes the halo hexagonal?
The accent stones are set into a six-sided frame rather than a circle. Six straight edges around a round center create a deliberate contrast between the geometric outline and the soft circle inside it.
Are the accent stones real diamonds?
No. They are simulated diamonds, also called cubic zirconia, set close together around the halo to brighten the border and intensify the color at the center.
Is alexandrite hard enough for daily wear?
Yes. Alexandrite rates 8.5 on the Mohs scale, which places it above most colored gemstones and well within the range suited to an everyday ring.
Is the ring hypoallergenic?
Yes. It is nickel-free and hypoallergenic, which matters if rings have irritated your skin in the past.
How wide is the band?
Approximately 2.3 mm on average, with a comfort-fit interior that is gently rounded so it slides over the knuckle more easily than a flat band.
What light shows the color shift best?
Move between a window and a warm indoor lamp. The contrast between daylight and incandescent light produces the most dramatic change, and it is the easiest way to demonstrate the stone to someone.
Which birthstone is alexandrite?
Alexandrite is one of June's birthstones, alongside pearl and moonstone, which makes this a natural choice for a June birthday.
How should I clean it?
Wipe the ring with a soft, dry cloth after wearing and use a soft brush around the halo where skin oils collect and dull the sparkle. Avoid household cleaners and chlorinated water, and store it dry.
What comes with my order?
The ring arrives in a free ring box with free U.S. shipping, ready to give.