Natural Umbalite Garnet 10.05 ct – Cushion Cut, Untreated, Certified, Tanzania

Natural umbalite garnet, 10.05 carats, cushion cut, VVS clarity, untreated, certified, from Tanzania

Natural Umbalite Garnet 10.05 ct – Cushion Cut, Untreated, Certified, Tanzania

Name: Natural Umbalite Garnet 10.05 ct – Cushion Cut, Untreated, Certified, Tanzania
Brand: SOSNA Gems & Jewellery
SKU: 2200615
Price: 59852.00 CZK
Availability: InStock

59.852,00 CZK

Gemstone Specification

Carat Weight 10.05

Dimensions 12.86 × 10.79 × 7.98 mm

Color Slightly Orangy Red

Clarity Eye Clean

Shape Cushion

Treatment No Treatment

Origin Tanzania

Certification Czech Gemological Laboratory

This 10.05 carat natural umbalite garnet from Tanzania displays a slightly orangy-red hue with vibrant undertones, cut into a cushion shape measuring 12.86 × 10.79 × 7.98 mm. With VVS clarity, the gemstone shows very high transparency and brilliance, with only minimal inclusions visible under magnification. Untreated and naturally formed, this garnet represents a fine-quality example of the umbalite variety, valued for its balance of warm red and subtle orange-pink tones. Certified by an independent gemological laboratory, it comes with professional verification of its authenticity and natural origin. A rare larger gemstone, it is suitable for advanced collectors as well as for high-end custom jewelry designs.

Natural Umbalite Garnet 10.05 ct – Cushion Cut, Untreated, Certified, Tanzania

59.852,00 CZK

From gemstone to jewelry

This example illustrates one possible way a gemstone may be developed into a bespoke piece. Final design is always defined individually, based on the stone and its natural character.

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Garnet refers to a group of closely related silicate minerals rather than a single gemstone variety. This group includes several distinct species and varieties, each with its own characteristic color range, composition, and visual appearance. Garnets are valued for their diversity, durability, and long-standing use in jewelry across cultures and historical periods.
Chemically, garnets share a common crystal structure but differ in composition, most commonly involving combinations of aluminum, iron, magnesium, calcium, and manganese. All garnets crystallize in the cubic crystal system and belong to the silicate mineral group. In gem-quality material, garnets typically display a vitreous luster and transparent to slightly translucent clarity.
Refractive index values vary across garnet varieties, generally ranging from approximately 1.72 to 1.89, resulting in strong light return and rich color saturation. Garnets are found in many regions worldwide, with typical sources including Africa, Sri Lanka, India, Brazil, and Madagascar, depending on the specific variety.

Durability & suitability

With hardness values typically ranging from 6.5 to 7.5 on the Mohs scale, garnets offer good durability suitable for a wide range of jewelry applications when properly set and worn with standard care. Their lack of cleavage contributes to reliable resistance against everyday wear.
Most garnet varieties perform well in rings, pendants, earrings, and bracelets, particularly when set in designs that provide reasonable protection. While durability can vary slightly between individual garnet species, the group as a whole is well suited for both everyday jewelry and more expressive, statement-oriented designs.

Treatments & authenticity

Garnets are most commonly found in nature without the need for enhancement. Unlike many other gemstone groups, treatments are generally uncommon across most garnet varieties, which contributes to their appeal among collectors and jewelry designers alike.
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 .