Natural Red Jasper Stone 10.40 Carat (11.48 Ratti) Round Cabochon
SKU: SGTL009060
Gemstone & Physical Specifications
Details of this stone, with the standard gemological properties of its species.
- Weight
- 10.40 Carat (≈ 11.43 Ratti)
- Shape / Cut
- Round Cabochon
- Color
- Brick Red with Natural Mineral Matrix
- Species / Mineral
- Natural Chalcedony (Jasper)
- Refractive Index (R.I.)
- 1.54 (Spot)
- Fluorescence
- Inert
- Dimensions
- 19 x 12 x 5 mm
- Treatment
- Un-Heated & Un-Treated
- Transparency / Clarity
- Opaque
- Hardness
- 6.5 - 7.0 on the Mohs Scale
- Specific Gravity (S.G.)
- 2.58 - 2.65
- Conclusion / Identification
- Natural Red Jasper Stone
Detailed Product Description
Natural Red Jasper Stone – 10.40 Carat (11.48 Ratti)
This Natural Red Jasper Stone weighs exactly 10.40 Carats (11.48 Ratti) with calibrated dimensions of 19 x 12 x 5 mm. Cut and polished into an exquisite Round Cabochon, this Earth-mined mineral specimen displays an authentic, rich terracotta and brick-red hue with subtle natural mineral mottling and a smooth, waxy-to-vitreous luster.
Mineralogical Identity & Physical Constants: Red Jasper is an opaque, microcrystalline variety of Quartz (SiO2) belonging to the chalcedony family. Its distinctive terracotta red color is produced by finely disseminated microscopic iron oxide (Hematite, Fe2O3) inclusions intergrown within the cryptocrystalline silica matrix during sedimentary or hydrothermal formation. Under gemological testing, it exhibits a spot refractive index of ~1.54, a specific gravity of 2.58 to 2.65, and a resilient Mohs hardness of 6.5 to 7.0 with tough aggregate tenacity and no cleavage planes.
Cultural & Historical Context: Red Jasper has a revered archaeological legacy spanning thousands of years. Known in ancient Egypt as the “blood of Isis” and worn as warrior talismans in Greco-Roman antiquity, it has long been admired for its earthy red warmth. In contemporary Vedic astrology, it is occasionally selected as an accessible, earthier secondary substitute (Upratna) for Natural Red Coral (Moonga) or solar jewelry, popularly set in Sterling Silver (925 Silver), Copper, or Panchdhatu.
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.
Frequently Asked Questions
Is this Red Jasper gemstone 100% natural and undyed?
Yes. This gemstone is guaranteed 100% Earth-mined natural Red Jasper (microcrystalline quartz). It has not been subjected to artificial chemical dyeing, polymer impregnation, or heat treatment, retaining its authentic terracotta-red pigmentation.
What causes the distinctive terracotta-red color in Natural Red Jasper?
The rich terracotta and brick-red coloration is produced by finely disseminated microscopic iron oxide (Hematite, Fe2O3) inclusions intergrown within cryptocrystalline silica quartz fibers during subterranean genesis. Unlike translucent carnelian or agate, Jasper contains up to 20% mineral inclusions, making it completely opaque.
How does Carat weight compare to traditional Ratti for this stone?
This gemstone weighs 10.40 Carats, corresponding to 11.48 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 the authenticity and certification of this Red Jasper verified?
Every Red Jasper gemstone includes an independent accredited gemological laboratory testing report verifying natural quartz (jasper) identity, cut dimensions, specific gravity (2.58–2.65), refractive index (~1.54 spot), hardness (6.5–7.0), and untreated 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).
How durable is Natural Red Jasper, and how should it be cleaned?
With a Mohs hardness of 6.5 to 7.0 and an interlocking granular structure with no cleavage planes, Red Jasper is very durable for daily jewelry wear in rings and pendants. Clean with warm water, mild soap, and a soft microfiber cloth. Avoid exposure to harsh industrial acids or abrasive scouring pastes.
Customer Reviews
Verified feedback across our certified Red Jasper Stones collection. Because each natural gemstone is rare and one-of-a-kind, reviews reflect genuine patron experiences with this gemstone family.