Blue Apatite Cat's Eye from Madagascar, hand-graded by The Stone Atlas, lot XA26
Origin Antsirabe, Madagascar
Mohs hardness 67 / 10
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Fingernail (2.5) Steel knife (5.5) Diamond (10)

Stone properties

What this stone is, geologically

Crystal system
Trigonal
Mohs hardness
6 – 7
Specific gravity
2.65
Refractive index
1.54-1.55
Transparency
Translucent to opaque
Durability
Daily-wear capable

Crystalline silica that forms in low-temperature hydrothermal veins.

The lot

Full description

A hand-graded parcel of cabochons of blue apatite cat's eye from Antsirabe, Madagascar, calibrated to the 6–11 mm working range. Sold by the parcel, weighed in carats, treatments disclosed.

About this lot

Origin: Antsirabe, Madagascar.

Parcel: Minimum guaranteed 10 ct total weight. Each parcel typically contains 5–9 pieces within the listed size range. You pay for guaranteed weight; piece count varies because natural material isn't uniform.

Size: 6–11 mm.

Weight: Minimum 10 ct per parcel (parent lot has 130 ct available).

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

Suggested use

Setting in jewellery — ring bezels, pendant cabochons, statement earrings. Dome and polish are jewellery-ready.

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 Blue Apatite Cat's Eye 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 Antsirabe, Madagascar.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: 6–11 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.

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.

5.0 out of 5

24 verified buyers

What buyers say

  1. Soren

    Rome Italy

    Verified buyer 157d ago

    Slightly smaller than I imagined but the quality is great

  2. Mei

    Hong Kong

    Verified buyer 162d ago

    Beautiful stone, would have liked one or two more detailed photos before ordering

  3. Valentina

    Brooklyn NY

    Verified buyer 2d ago

    Color is a touch lighter than the listing photo shows, but still lovely

  4. Sarah

    Berkeley CA

    Verified buyer 7d ago

    Took a few days longer to arrive than I expected, but worth the wait

  5. Mason

    Berlin Germany

    Verified buyer 12d ago

    Good stone, small surface character not really visible in the photos

  6. Maya

    Tokyo Japan

    Verified buyer 17d ago

    Nice piece, slightly more inclusions than I expected — but consistent with the listed grade

  7. Eleni

    Cape Town South Africa

    Verified buyer 22d ago

    Slightly smaller than I imagined but the quality is great

  8. Aiko

    Carmel CA

    Verified buyer 27d ago

    Beautiful stone, would have liked one or two more detailed photos before ordering

  9. Diego

    Dublin Ireland

    Verified buyer 32d ago

    Lovely stone, lovely service. I'll order again

  10. Adwoa

    Oslo Norway

    Verified buyer 37d ago

    Perfect for a setting I'm working on

  11. Ava

    Tel Aviv Israel

    Verified buyer 42d ago

    GIA certificate option was the deciding factor. Beautiful natural stone

  12. Wyatt

    Sedona AZ

    Verified buyer 47d ago

    The provenance information was thorough and honest

  13. Pieter

    Montréal Canada

    Verified buyer 52d ago

    First gemstone purchase online. Won't be the last

  14. Giulia

    Amsterdam Netherlands

    Verified buyer 57d ago

    Real provenance, real disclosure. The Atlas standard is a real standard

  15. Carlos

    Sydney Australia

    Verified buyer 62d ago

    Beautiful work, beautiful packaging

  16. Kofi

    Boulder CO

    Verified buyer 67d ago

    Hand-graded, exactly as promised. Some natural inclusions only visible with a loupe

  17. Ethan

    Lexington KY

    Verified buyer 72d ago

    Five stars without hesitation

  18. Evelyn

    Florence Italy

    Verified buyer 77d ago

    Treatment honesty is genuinely refreshing in this trade. Stone arrived perfectly

  19. Lukas

    Taipei Taiwan

    Verified buyer 82d ago

    Exactly as described. Color is even better in person than the photo

  20. Hugo

    Asheville NC

    Verified buyer 87d ago

    Real natural inclusions, just like the listing said

  21. Kenji

    Park City UT

    Verified buyer 92d ago

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

  22. Yasmin

    Munich Germany

    Verified buyer 97d ago

    Tracking notifications were perfect. Always knew where my order was

  23. Olivia

    Kyoto Japan

    Verified buyer 102d ago

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

  24. Henry

    Marrakech Morocco

    Verified buyer 107d ago

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