Chrysocolla from Africa, hand-graded by The Stone Atlas, lot XA21
Origin Africa
Mohs hardness 2.53.5 / 10
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Fingernail (2.5) Steel knife (5.5) Diamond (10)

Stone properties

What this stone is, geologically

Crystal system
Monoclinic (azurite); amorphous (chrysocolla)
Mohs hardness
2.5 – 3.5
Specific gravity
2.0–2.4
Refractive index
1.575–1.635
Transparency
Opaque
Durability
Soft — display and pendant use preferred

Secondary copper minerals from the weathering of copper sulphides. Vivid blue-green from copper oxidation.

The lot

Full description

A hand-graded cabochon of chrysocolla from Africa, calibrated to the 25 mm working range. Sold as a single piece, weighed in carats, treatments disclosed.

About this lot

Origin: Africa.

Format: One specific cabochon, weighing approximately 19 ct, hand-graded from a parent lot of 576 ct. Each stone is similar in size and grade; you receive one cab matched to the listing.

Size: 25 mm.

Weight: ~19 ct per piece.

Treatment: None. 100% natural, untreated material. Disclosed on every listing — that's the Atlas standard.

Suggested use

Pendant settings or display — softer copper minerals, handle with care.

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 Chrysocolla 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 Africa.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: 25 mm. Listed weight: 19 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.

4.8 out of 5

10 verified buyers

What buyers say

  1. Rohan

    London UK

    Verified buyer 37d ago

    Real natural inclusions, just like the listing said

  2. Nour

    Brussels Belgium

    Verified buyer 42d ago

    Compared this to two others I bought from competitors. Clearly better saturation. Stone Atlas is now my go-to

  3. Mia

    Melbourne Australia

    Verified buyer 47d ago

    Tracking notifications were perfect. Always knew where my order was

  4. Owen

    Madison WI

    Verified buyer 52d ago

    Used this for a lapidary class — perfect for what we needed

  5. Iris

    Portland ME

    Verified buyer 57d ago

    Beautiful stone. Treatment was disclosed up front, exactly as the listing said. That kind of honesty is rare in this trade

  6. Niels

    Barcelona Spain

    Verified buyer 62d ago

    Photos don't do this justice. Even better in hand

  7. Arjun

    Mumbai India

    Verified buyer 67d ago

    Beautiful. Will order again

  8. Omar

    Bozeman MT

    Verified buyer 72d ago

    Stone is exactly the size and weight described

  9. Daniel

    Jackson WY

    Verified buyer 77d ago

    Beautiful color in natural light. Lamp light brings out a different character

  10. Amelia

    Vienna Austria

    Verified buyer 82d ago

    Arrived faster than expected, tracked the whole way. The kraft box with the wax seal is a beautiful touch