4.28 ct aquamarine in oval brilliant cut, very light greenish blue, untreated, ČGL certified

Natural aquamarine, 4.28 carats, oval cut, eye-clean clarity, transparent, very light slightly greenish-blue color, CGL certified.

Natural Aquamarine 4.28 ct – Light Greenish Blue, Oval Brilliant Cut, Untreated, ČGL Certified

Name: Natural Aquamarine 4.28 ct – Light Greenish Blue, Oval Brilliant Cut, Untreated, ČGL Certified
Brand: SOSNA Gems & Jewellery
SKU: GP-114148
Price: 13177.00 CZK
Availability: InStock

13.177,00 CZK

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Gemstone Specification

Carat Weight 4.28

Dimensions 12.44 x 9.41 x 7.02 mm

Color Light Blue

Clarity Eye Clean

Shape Oval

Treatment No Treatment

Certification Czech Gemological Laboratory (EU)

This 4.28 carat natural aquamarine features an elegant oval cut measuring 12.44 × 9.41 × 7.02 mm. Displaying a very light, slightly greenish-blue color with eye-clean clarity and excellent transparency, this natural gemstone offers a refined and timeless appearance. Certified by the Czech Gemological Laboratory (CGL), an independent European gemological laboratory, it includes professional verification of its natural origin and gemological characteristics. The report is signed by a GIA Graduate Gemologist (GIA GG), providing additional confidence in the gemstone's identification. Its balanced proportions, attractive clarity, and certified authenticity make it an excellent choice for bespoke rings, pendants, or other fine jewelry creations.

Natural Aquamarine 4.28 ct – Light Greenish Blue, Oval Brilliant Cut, Untreated, ČGL Certified

13.177,00 CZK

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Aquamarine is a blue to blue-green variety of beryl, appreciated for its clear, fresh coloration and natural transparency. Within the beryl family, it is valued for its calm visual character and refined appearance, particularly in well-cut stones with even color distribution.
Chemically composed of beryllium aluminum silicate (Be₃Al₂Si₆O₁₈), aquamarine crystallizes in the hexagonal crystal system and belongs to the silicate mineral group. In gem-quality specimens, it typically displays a vitreous luster and high transparency.
The refractive index of aquamarine generally ranges from 1.577 to 1.583, contributing to a subtle, elegant brilliance rather than strong dispersion. Aquamarine is found in several regions worldwide, with typical sources including Brazil, Madagascar, Mozambique, Nigeria, and Pakistan, each known for slightly different tonal qualities.

Durability & suitability

Aquamarine is a blue to blue-green variety of beryl, appreciated for its clear, fresh coloration and natural transparency. Within the beryl family, it is valued for its calm visual character and refined appearance, particularly in well-cut stones with even color distribution.
Chemically composed of beryllium aluminum silicate (Be₃Al₂Si₆O₁₈), aquamarine crystallizes in the hexagonal crystal system and belongs to the silicate mineral group. In gem-quality specimens, it typically displays a vitreous luster and high transparency.
The refractive index of aquamarine generally ranges from 1.577 to 1.583, contributing to a subtle, elegant brilliance rather than strong dispersion. Aquamarine is found in several regions worldwide, with typical sources including Brazil, Madagascar, Mozambique, Nigeria, and Pakistan, each known for slightly different tonal qualities.

Treatments & authenticity

With a hardness of 7.5 to 8 on the Mohs scale, aquamarine offers good durability suitable for everyday jewelry when properly set and worn with standard care. It performs reliably across a wide range of jewelry designs, including rings, pendants, earrings, and bracelets.
While aquamarine is generally resistant to everyday wear, larger stones or more exposed settings benefit from protective designs to reduce the risk of impact. Its combination of durability, clarity, and naturally soothing color makes aquamarine a versatile choice for both everyday jewelry and elegant, understated statement pieces.

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 .