Just sold
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Stone properties
Aluminum oxide crystallized at high temperature in metamorphic and igneous environments. Asterism comes from oriented rutile inclusions.
The lot
A hand-graded parcel of cabochons of star ruby from Longido, Tanzania, calibrated to the 9–16 mm working range. Sold by the parcel, weighed in carats, treatments disclosed.
Origin: Longido, Tanzania.
Parcel: Minimum guaranteed 10 ct total weight. Each parcel typically contains 1–3 pieces within the listed size range. You pay for guaranteed weight; piece count varies because natural material isn't uniform.
Size: 9–16 mm.
Weight: Minimum 10 ct per parcel (parent lot has 256 ct available).
Treatment: None. 100% natural, untreated material. Disclosed on every listing — that's the Atlas standard.
Setting in jewellery — ring bezels, pendant cabochons, statement earrings. Dome and polish are jewellery-ready.
Hand-graded in our US studio. Treatments disclosed on every listing, no exceptions. Shipped insured from the US since 1995. Returns within 14 days if the stone in hand doesn't match the listing.
Shipping & returns
Common questions
No. This Star Ruby is 100% natural with no heat, diffusion, dyeing, or fracture-filling treatment. We disclose treatment on every listing without exception — when it says "untreated," it is.
This piece is from Longido, Tanzania.When we know the specific city or mine, we tag it on every listing. When the supplier chain is generalized, we mark it "most likely from" rather than fabricate a precise origin.
Yes. GIA certification is available as a $95 add-on after checkout. Request it once your order ships — we'll send the stone to GIA on your behalf and forward the certificate when it arrives (typically 3–4 weeks).
Every stone comes with a 30-day inspection window. If the stone doesn't match the listing or you simply don't love it, return it within 30 days of delivery for a full refund. We cover return shipping. No restocking fees, no questions.
Orders ship from the US within 1–2 business days. Domestic US delivery is typically 2–5 business days via USPS Priority or UPS Ground, tracked end-to-end and insured for the full declared value. International shipping is available at checkout.
Listed size for this piece: 9–16 mm. Listed weight: 10 ct ct. All sizes and weights are hand-measured. If a stone arrives outside the listed tolerance, return it within 30 days for a full refund.
Yes. Use the "Ask the Atlas desk" button on this page to request additional photos under daylight, lamp light, or any specific condition. We typically reply within one business day with photos attached.
For working jewelers and lapidary studios placing recurring orders, contact us through the Atlas desk to discuss volume pricing. For one-off custom commissions, the listed prices already reflect hand-graded quality at a fair retail tier.
4.7 out of 5
15 verified buyers
What buyers say
Aisha
Sedona AZ
Real natural inclusions, just like the listing said
Liam
Montréal Canada
Compared this to two others I bought from competitors. Clearly better saturation. Stone Atlas is now my go-to
Eliza
Amsterdam Netherlands
Tracking notifications were perfect. Always knew where my order was
Lucia
Sydney Australia
Used this for a lapidary class — perfect for what we needed
Astrid
Boulder CO
Beautiful stone. Treatment was disclosed up front, exactly as the listing said. That kind of honesty is rare in this trade
Camila
Lexington KY
Photos don't do this justice. Even better in hand
Amara
Florence Italy
Beautiful. Will order again
Sophia
Taipei Taiwan
Stone is exactly the size and weight described
Caleb
Asheville NC
Beautiful color in natural light. Lamp light brings out a different character
Stefan
Park City UT
Arrived faster than expected, tracked the whole way. The kraft box with the wax seal is a beautiful touch
Léa
Munich Germany
Atlas standard is real. Treatment honesty matters
Hana
Kyoto Japan
Set this into a pendant for my partner. They love it
Khalid
Marrakech Morocco
Beautiful piece. Couldn't be happier
James
Bend OR
The shipping was insured and tracked end-to-end. Felt safe ordering
Harper
Paris France
Bought this for a custom ring setting. The depth of color is gorgeous and the size is perfect
Recently viewed
The Atlas standard
Five things we promise on the listing, in the package, and after the sale — every time.
Earth-mined. Never lab-grown, never synthetic, never simulated. The only kind of stone we sell — without exception, since 1995.
Country and city when we know it. “Most likely from” when the chain is generalized. Never invented.
Heat, diffusion, dyeing, fracture-filling — declared on every listing. Or marked untreated, when we can confirm it.
Hold every stone in your own light. Return for any reason, free. No questions, no restocking fee. We pay the shipping.
From the US, end-to-end tracked, fully insured to your door. 1–2 days to pack, 2–5 in transit. GIA certification on request.
Just sold
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