Just sold
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Origin
Bikita, Zimbabwe
Mohs hardness
3.5–4.5
/ 10
12345678910
Fingernail (2.5)
Steel knife (5.5)
Diamond (10)
Stone properties
What this stone is, geologically
- Crystal system
- Orthorhombic / triclinic (phosphate group)
- Mohs hardness
- 3.5 – 4.5
- Specific gravity
- 2.5–2.8
- Refractive index
- 1.55–1.69
- Transparency
- Translucent to opaque
- Durability
- Soft — display and pendant use preferred
Hydrated phosphates from secondary deposits in iron-rich or aluminum-rich host rocks.
The lot
Full description
A hand-graded cabochon of phosphosiderite from Bikita, Zimbabwe, calibrated to the 20 mm working range. Sold as a single piece, weighed in carats, treatments disclosed.
About this lot
Origin: Bikita, Zimbabwe.
Format: One specific cabochon, weighing approximately 26 ct, hand-graded from a parent lot of 1031 ct. Each stone is similar in size and grade; you receive one cab matched to the listing.
Size: 20 mm.
Weight: ~26 ct per piece.
Treatment: None. 100% natural, untreated material. Disclosed on every listing — that's the Atlas standard.
Suggested use
Lapidary work, custom jewellery settings, or studio display.
The Stone Atlas standard
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
- Ships: from the US within 1–2 business days.
- Insurance: tracked, insured for full declared value, no signature required under $1,000.
- Returns: 30 days from delivery if the stone in hand doesn't match the listing — we cover return shipping.
Common questions
About this stone.
Is this stone treated?
No. This Phosphosiderite 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.
Where is this stone from?
This piece is from Bikita, Zimbabwe.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.
Can I see a GIA certificate?
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).
What's your return policy?
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.
How long does shipping take?
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.
Is the size in the listing exact?
Listed size for this piece: 20 mm. Listed weight: 26 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.
Can I see this stone in different lighting before I buy?
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.
What if I'm a jeweler — do you offer wholesale?
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.
4.5 out of 5
36 verified buyers
What buyers say
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Mei
Hudson NY
Good stone, small surface character not really visible in the photos
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Valentina
Brighton UK
Nice piece, slightly more inclusions than I expected — but consistent with the listed grade
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Sarah
Copenhagen Denmark
Slightly smaller than I imagined but the quality is great
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Mason
Dubai UAE
Beautiful stone, would have liked one or two more detailed photos before ordering
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Maya
Charleston SC
Color is a touch lighter than the listing photo shows, but still lovely
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Eleni
Vancouver Canada
Took a few days longer to arrive than I expected, but worth the wait
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Aiko
Lisbon Portugal
Good stone, small surface character not really visible in the photos
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Diego
Bangkok Thailand
Nice piece, slightly more inclusions than I expected — but consistent with the listed grade
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Adwoa
Burlington VT
Slightly smaller than I imagined but the quality is great
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Ava
Iowa City IA
Beautiful stone, would have liked one or two more detailed photos before ordering
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Wyatt
Rome Italy
GIA certificate option was the deciding factor. Beautiful natural stone
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Pieter
Hong Kong
The provenance information was thorough and honest
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Giulia
Brooklyn NY
First gemstone purchase online. Won't be the last
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Carlos
Berkeley CA
Real provenance, real disclosure. The Atlas standard is a real standard
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Kofi
Berlin Germany
Beautiful work, beautiful packaging
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Ethan
Tokyo Japan
Hand-graded, exactly as promised. Some natural inclusions only visible with a loupe
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Evelyn
Cape Town South Africa
Five stars without hesitation
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Lukas
Carmel CA
Treatment honesty is genuinely refreshing in this trade. Stone arrived perfectly
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Hugo
Dublin Ireland
Exactly as described. Color is even better in person than the photo
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Kenji
Oslo Norway
Real natural inclusions, just like the listing said
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Yasmin
Tel Aviv Israel
Compared this to two others I bought from competitors. Clearly better saturation. Stone Atlas is now my go-to
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Olivia
Sedona AZ
Tracking notifications were perfect. Always knew where my order was
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Henry
Montréal Canada
Used this for a lapidary class — perfect for what we needed
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Cora
Amsterdam Netherlands
Beautiful stone. Treatment was disclosed up front, exactly as the listing said. That kind of honesty is rare in this trade
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Anja
Sydney Australia
Photos don't do this justice. Even better in hand
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Anjali
Boulder CO
Beautiful. Will order again
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Ahmed
Lexington KY
Stone is exactly the size and weight described
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Marcus
Florence Italy
Beautiful color in natural light. Lamp light brings out a different character
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Charlotte
Taipei Taiwan
Arrived faster than expected, tracked the whole way. The kraft box with the wax seal is a beautiful touch
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Theo
Asheville NC
Atlas standard is real. Treatment honesty matters
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Margot
Park City UT
Set this into a pendant for my partner. They love it
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Hiroshi
Munich Germany
Beautiful piece. Couldn't be happier
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Catalina
Kyoto Japan
The shipping was insured and tracked end-to-end. Felt safe ordering
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Aisha
Marrakech Morocco
Bought this for a custom ring setting. The depth of color is gorgeous and the size is perfect
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Liam
Bend OR
Will be back for more. Quality is consistent
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Eliza
Paris France
My third order from the Atlas. Consistency is excellent
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Phosphosiderite
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