Blue Turquoise from Iran, hand-graded by The Stone Atlas, lot XA93
Origin Nishapur, Khorasan Razavi, Iran
Mohs hardness 56 / 10
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Fingernail (2.5) Steel knife (5.5) Diamond (10)

Stone properties

What this stone is, geologically

Crystal system
Triclinic
Mohs hardness
5 – 6
Specific gravity
2.6–2.9
Refractive index
1.61–1.65
Transparency
Opaque
Durability
Moderate — avoid heat, acids, and abrasion

Hydrated copper-aluminum phosphate forming as secondary mineral in arid copper-rich terrain.

The lot

Full description

A hand-graded parcel of cabochons of blue turquoise from Nishapur, Khorasan Razavi, Iran, calibrated to the 13–25 mm working range. Sold by the parcel, weighed in carats, treatments disclosed.

About this lot

Origin: Nishapur, Khorasan Razavi, Iran.

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: 13–25 mm.

Weight: Minimum 10 ct per parcel (parent lot has 1126 ct available).

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

Suggested use

Premium jewellery settings — bezel mounts in 14k or 18k gold, sterling silver collector pieces. Treat with care: not impact-resistant.

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 Turquoise 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 Nishapur, Khorasan Razavi, Iran.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: 13–25 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

8 verified buyers

What buyers say

  1. Abigail

    Sydney Australia

    Verified buyer 112d ago

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

  2. Henrik

    Boulder CO

    Verified buyer 117d ago

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

  3. Matteo

    Lexington KY

    Verified buyer 122d ago

    Smaller than I imagined but quality is high — exactly as listed

  4. Rohan

    Florence Italy

    Verified buyer 127d ago

    Fast shipping, beautiful packaging, accurate listing. What more can you ask

  5. Nour

    Taipei Taiwan

    Verified buyer 132d ago

    Bought as a 10-year anniversary gift. Stunning

  6. Mia

    Asheville NC

    Verified buyer 137d ago

    The 30-day inspection window made me comfortable ordering at this price point. Didn't need to use it

  7. Owen

    Park City UT

    Verified buyer 142d ago

    Exactly what I needed for my project

  8. Iris

    Munich Germany

    Verified buyer 147d ago

    Working on a custom necklace; this is the centerpiece