Golden Beryl Cat's Eye from Brazil, hand-graded by The Stone Atlas, lot XA57
Origin Minas Gerais, Brazil
Mohs hardness 7.58 / 10
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Fingernail (2.5) Steel knife (5.5) Diamond (10)

Stone properties

What this stone is, geologically

Crystal system
Hexagonal
Mohs hardness
7.5 – 8
Specific gravity
2.66–2.92
Refractive index
1.567–1.600
Transparency
Transparent to translucent
Durability
Excellent — daily-wear capable

Beryllium aluminum cyclosilicate. Family includes emerald, aquamarine, golden beryl, morganite.

The lot

Full description

A hand-graded parcel of cabochons of golden beryl cat's eye from Minas Gerais, Brazil, calibrated to the 8–15 mm working range. Sold by the parcel, weighed in carats, treatments disclosed.

About this lot

Origin: Minas Gerais, Brazil.

Parcel: Minimum guaranteed 10 ct total weight. Each parcel typically contains 2–4 pieces within the listed size range. You pay for guaranteed weight; piece count varies because natural material isn't uniform.

Size: 8–15 mm.

Weight: Minimum 10 ct per parcel (parent lot has 220 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 Golden Beryl 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 Minas Gerais, Brazil.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: 8–15 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.

4.7 out of 5

8 verified buyers

What buyers say

  1. Levi

    Bordeaux France

    Verified buyer 22d ago

    Real natural inclusions, just like the listing said

  2. Sofia

    Prague Czechia

    Verified buyer 27d ago

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

  3. Priya

    Mexico City Mexico

    Verified buyer 32d ago

    Tracking notifications were perfect. Always knew where my order was

  4. Layla

    Hudson NY

    Verified buyer 37d ago

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

  5. Emma

    Brighton UK

    Verified buyer 42d ago

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

  6. Lucas

    Copenhagen Denmark

    Verified buyer 47d ago

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

  7. Ruth

    Dubai UAE

    Verified buyer 52d ago

    Beautiful. Will order again

  8. Klara

    Charleston SC

    Verified buyer 57d ago

    Stone is exactly the size and weight described