Natural Red Spinel 6.55 ct – Oval Cut, Untreated, Tanzania

Natural Red Spinel 6.55 ct – Oval Cut, Untreated, Tanzania

Name: Natural Red Spinel 6.55 ct – Oval Cut, Untreated, Tanzania
Brand: SOSNA Gems
Availability: InStock

Price on request

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Gemstone Specification

Carat Weight 6.55

Dimensions 12.30 x 10.00 x 7.10 mm

Color Red

Clarity Eye Clean

Shape Oval

Treatment No Treatment

Origin Tanzania

Certification IGI or GIA

This natural red spinel weighs 6.55 carats and is cut in a finely proportioned oval shape, measuring 12.3 × 10.0 × 7.1 mm. It exhibits a vivid red hue, highly desirable among collectors and connoisseurs of rare gemstones. With excellent transparency and brilliance, it is certified as unheated and untreated (no indications of enhancement), preserving its natural authenticity. Originating from Tanzania, an increasingly recognized source for high-quality spinels, this gemstone combines significant size, strong saturation, and natural untreated status. Such attributes make it an attractive investment-grade gemstone, highly suited for refined custom jewelry and demanding collectors.

Natural Red Spinel 6.55 ct – Oval Cut, Untreated, TanzaniaPrice on request

From gemstone to jewelry

This gemstone can be transformed into a custom-made jewel.
The example shown illustrates how a loose stone may be set into a bespoke design.
Each final piece is created individually in consultation with our experts.

Loose gemstone

Bespoke jewelry

Custom jewelry service

Selected gemstones from our collection can be transformed into bespoke jewelry.
The example above illustrates one of many possible design outcomes, each created individually in consultation with our experts to reflect both your preferences and the stone’s natural character.

Learn more about custom jewelry

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Fully insured worldwide shipping with discreet packaging.

Gemological Disclosure

Each gemstone is professionally examined and accompanied by clear gemological information regarding its characteristics, treatments, and origin.

Ethical & Transparent Sourcing

We guarantee legal and ethical origin of every gemstone.

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Protected payments, professional handling, and client confidentiality.

Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Spinel is a natural magnesium aluminum oxide mineral valued for its excellent transparency, vibrant color range, and clean crystal structure. In gem-quality material, spinel is appreciated for its clarity and lively appearance, with colors ranging from red, pink, and purple to blue, gray, and black, depending on trace elements present during formation.
Chemically composed of magnesium aluminum oxide (MgAl₂O₄), spinel crystallizes in the cubic crystal system and belongs to the oxide mineral group. In transparent gem-quality specimens, it typically displays a vitreous luster with high clarity.
The refractive index of spinel generally ranges from approximately 1.718 to 1.738, producing a bright, balanced brilliance without excessive dispersion. Spinel is found in several regions worldwide, with notable sources including Myanmar, Sri Lanka, Vietnam, Tanzania, and parts of Afghanistan, each associated with slightly different color characteristics.

Durability & suitability

With a hardness of 8 on the Mohs scale, spinel offers very good durability suitable for everyday jewelry when properly set and worn with standard care. Its lack of cleavage contributes to excellent resistance against impact and abrasion compared to many other colored gemstones.
Spinel performs reliably in rings, pendants, earrings, and bracelets, including designs intended for frequent wear. Its combination of durability, stable color, and refined brilliance makes spinel a practical and versatile choice for both everyday jewelry and elegant, statement-oriented designs.

Treatments & authenticity

Spinel is most commonly found in nature without the need for enhancement. Treatments are generally uncommon, and gem-quality spinel is typically valued for its natural color and clarity.
Any treatments or enhancements, if present, are always clearly stated for each individual gemstone. Every stone is professionally examined, and transparent disclosure is regarded as a fundamental part of responsible gemological practice, allowing clients to make informed and confident decisions.

Our approach to gemstones

We focus primarily on natural, untreated gemstones, valued for their authenticity and inherent beauty.
Any treatments or enhancements are always clearly disclosed, allowing our clients to make informed decisions based on transparent gemological standards.

Sosna Gems is not a licensed financial advisor. Gemstones are collectibles, not securities. Past performance is not indicative of future results. Legal & risk disclosure .