Natural sapphire, 5.13 carats, oval cut, VVS clarity, unheated, greenish blue, GIA certified

Natural sapphire, 5.13 carats, oval cut, VVS clarity, unheated, greenish blue, GIA certificate

Teal Sapphire 5.13 ct, GIA Certified, Unheated, Madagascar

Name: Teal Sapphire 5.13 ct, GIA Certified, Unheated, Madagascar
Brand: SOSNA Gems & Jewellery
Price: 241003.00 CZK
Availability: InStock

241.003,00 CZK

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This 5.13 carat natural sapphire displays a distinctive greenish blue (teal) color, cut into an elegant oval shape measuring 10.34 × 8.70 × 6.93 mm. With VVS clarity, the gemstone offers excellent transparency and brilliance, enhancing its visual depth and luster. The stone is completely untreated, with no indications of heating—an increasingly rare and highly valued characteristic in sapphires of this size. Certified by the Gemological Institute of America (GIA), it comes with independent verification of authenticity and natural origin. Its combination of substantial carat weight, natural state, and refined color makes it an attractive choice for collectors as well as for high-end custom jewelry.

241.003,00 CZK

From gemstone to jewelry

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Sapphire is a gemstone variety of the mineral corundum, valued for its durability, clarity, and wide range of colors. While blue sapphire is the most widely recognized, sapphire occurs naturally in many hues, including yellow, pink, green, purple, and colorless, with each color expressing a distinct visual character.
Chemically composed of aluminum oxide (Al₂O₃), sapphire crystallizes in the trigonal crystal system and belongs to the oxide mineral group. In gem-quality material, sapphire typically displays a vitreous luster with transparent to translucent clarity.
The refractive index of sapphire generally ranges from approximately 1.76 to 1.77, producing a restrained brilliance that emphasizes color depth rather than strong dispersion. Sapphires are found in numerous regions worldwide, with notable sources including Sri Lanka, Madagascar, Myanmar, Thailand, Australia, and parts of Africa, each associated with characteristic color and clarity profiles.

Durability & suitability

With a hardness of 9 on the Mohs scale, sapphire offers exceptional durability suitable for everyday jewelry when properly set and worn with standard care. Its high resistance to scratching and lack of cleavage make it one of the most reliable colored gemstones for regular wear.
Sapphire performs exceptionally well in rings, pendants, earrings, and bracelets, including designs intended for frequent use. While natural inclusions may be present, particularly in certain origins and colors, thoughtful setting design helps protect the stone and maintain its appearance over time.

Treatments & authenticity

Sapphires are commonly treated to enhance color and clarity, most often through heat treatment, a practice widely accepted within the gem trade when properly disclosed. Other treatments may exist in the market and are always evaluated and disclosed on an individual basis.
Any treatments or enhancements 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 .