Natural American Firoza Stone (Turquoise) 10.33 Carat (11.35 Ratti) Oval Cabochon
SKU: NGLGS0122040711
Sold-Out Piece · Permanent Certificate & Specification Record
This one-of-a-kind Turquoise Stone (Firoza) piece (SKU: NGLGS0122040711) has been sold. Its photographs, weight, and gemological record remain online for buyer verification. Browse currently available Turquoise Stone (Firoza) pieces:
Gemstone & Physical Specifications
Details of this stone, with the standard gemological properties of its species.
- Weight
- 10.33 Carat (≈ 11.35 Ratti)
- Shape / Cut
- Oval Cabochon
- Treatment
- Un-Heated & Un-Treated
- Transparency / Clarity
- Opaque
- Hardness
- 5.0 - 6.0 on the Mohs Scale
- Specific Gravity (S.G.)
- 2.60 - 2.85
- Conclusion / Identification
- Natural American Turquoise (Firoza)
- Dimensions
- 17 x 12 x 8 mm
- Origin
- American
- Color
- Natural Sky Blue
- Species / Mineral
- Natural Turquoise
- Refractive Index (R.I.)
- 1.61 - 1.65 (Spot Reading)
- Fluorescence
- Inert
Detailed Product Description
Natural American Firoza Stone (Turquoise) – 10.33 Carat (11.35 Ratti) Oval Cabochon
This Natural American Firoza Stone (Turquoise) weighs exactly 10.33 Carats (11.35 Ratti) with calibrated dimensions of 17 x 12 x 8 mm. Cut and polished into an exquisite Oval Cabochon, this Earth-mined gemstone displays an authentic, vivid sky blue hue with a smooth, waxy-to-subvitreous luster and natural mineral texture.
Mineralogical Identity & Physical Constants: Turquoise is a hydrated basic copper and aluminum phosphate mineral with the chemical formula CuAl6(PO4)4(OH)8·4H2O. Its vibrant blue color is produced by trace copper (Cu2+) cations within the cryptocrystalline aggregate lattice. Under gemological testing, it exhibits a spot refractive index of 1.61 to 1.65, a specific gravity of 2.60 to 2.85, and a Mohs hardness of 5.0 to 6.0.
Cultural Legacy & Traditional Context: Known across ancient cultures as a talisman of safe travel and protection, and revered in Indian lapidary traditions as Firoza Ratna, Turquoise holds an iconic status. In traditional Vedic astrology, Firoza is frequently selected for Jupiter (Guru) and Ketu-related practices. It is also celebrated worldwide as the traditional December birthstone. It is customarily mounted in Sterling Silver (925 Silver), Panchdhatu, or yellow gold bezels for rings, pendants, and bracelets.
Please Note: Ratna Gems shares these historical, cultural, and gemological details solely for educational awareness. We sell all gemstones strictly on the basis of verified physical authenticity, mineral quality, and accredited laboratory certification, and make no astrological, metaphysical, or curative claims.
Care Instructions
- Clean gently with a dry or slightly damp soft microfiber cloth, then dry immediately.
- Avoid soaking in water, and keep completely away from perfumes, hairsprays, lotions, household detergents, and solvents (turquoise is naturally porous).
- Never clean with steam or ultrasonic equipment; avoid extreme heat and sharp abrasive impact.
- For everyday ring wear, a protective bezel mounting is recommended.
Frequently Asked Questions
Is this American Firoza 100% natural, unheated, and undyed?
Yes. This gemstone is guaranteed 100% Earth-mined natural Turquoise. It has not undergone artificial chemical dyeing, polymer stabilization, or heat treatment, preserving its genuine subterranean mineral pigmentation. Every stone is accompanied by an accredited independent gemological laboratory certificate.
How can I distinguish genuine Turquoise from dyed Howlite or plastic imitations?
Natural Turquoise possesses diagnostic specific gravity (2.60–2.85), spot refractive index (~1.61–1.65), and microcrystalline aggregate structure. Common market imitations include dyed white howlite, magnesite, or reconstituted resin blocks. An accredited gemological laboratory report scientifically verifies genuine copper aluminum phosphate identity.
How does Carat weight compare to traditional Ratti for this stone?
This gemstone weighs 10.33 Carats, corresponding to 11.35 Pakki Ratti (1 Carat = 200 mg; 1 Pakki Ratti ≈ 0.91 Carat). Both measurements are explicitly documented on your official laboratory test report.
How is this Firoza certified, and can I choose international testing?
Every Turquoise gemstone includes an independent accredited gemological laboratory testing report verifying natural turquoise identity, cut, dimensions, specific gravity (2.60–2.85), refractive index (1.61–1.65 spot), hardness (5.0–6.0), and unheated natural status. If you specifically require an additional report from GII, IIGJ or IGI, you can select it directly from the certification dropdown on this product page upon request (official laboratory testing fees apply in advance on a non-refundable basis).
What is the distinction between American Firoza and Irani Firoza?
American Turquoise originates from historic US mining deposits (such as Arizona or Nevada), displaying bright sky-blue to blue-green tones often with delicate matrix. Irani (Persian) Turquoise originates from Neyshabur mines in Iran, famous for solid, intensely saturated sky-blue hues with minimal host matrix. Both varieties represent authentic natural Turquoise.
More from Turquoise Stone (Firoza)
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Natural Irani Firoza (Turquoise) Stone 34.23 Carat (37.62 Ratti) Oval Shape
Natural Irani Firoza (Turquoise) Stone 12.56 Carat (13.80 Ratti) Oval Shape
Natural Irani Firoza (Turquoise) Stone 15.20 Carat (16.70 Ratti) Oval Shape
Customer Reviews
Verified feedback across our certified Turquoise Stone (Firoza) collection. Because each natural gemstone is rare and one-of-a-kind, reviews reflect genuine patron experiences with this gemstone family.