Blue apatite gemstone, 3.92 carats, octagonal cut, greenish blue color, VS clarity (inclusions), Madagascar origin, untreated, seller's certificate

Natural Blue Apatite 3.92 ct – Greenish Blue, Octagonal Cut, Untreated

Name: Natural Blue Apatite 3.92 ct – Greenish Blue, Octagonal Cut, Untreated
Brand: SOSNA Gems & Jewellery
SKU: AP-PAK-001
Price: 4219.00 CZK
Availability: InStock

4.219,00 CZK

Gemstone Specification

Carat Weight 3.92

Dimensions 10.69 x 7.56 x 5.96 mm

Color Greenish Blue

Clarity Slightly Included

Shape Octagonal

Treatment No Treatment

Certification Basic Seller's Certificate

This 3.92 carat natural blue apatite features a precise octagonal cut and a captivating greenish blue hue. With visible inclusions and no treatment, it offers a vibrant and natural aesthetic—perfect for bold, design-forward jewelry. Comes with a standard seller’s certificate; GIA or IGI certification available upon request.

Natural Blue Apatite 3.92 ct – Greenish Blue, Octagonal Cut, Untreated

4.219,00 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 Disclosure

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

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Apatite is a group of phosphate minerals known for their vivid and often striking color range, most commonly appearing in shades of blue, green, and teal. In gem-quality material, apatite is appreciated for its bright, saturated colors and natural transparency, which can closely resemble more well-known gemstones.
Chemically, apatite is a calcium phosphate mineral, typically described by the formula Ca₅(PO₄)₃(F,Cl,OH). It crystallizes in the hexagonal crystal system and belongs to the phosphate mineral group. Gem-quality apatite usually displays a vitreous luster with transparent to slightly translucent clarity.
The refractive index of apatite generally ranges from approximately 1.628 to 1.649, contributing to a noticeable brilliance and strong color presence rather than high dispersion. Apatite is found in several regions worldwide, with notable sources including Brazil, Madagascar, Myanmar, Mexico, and Sri Lanka.

Durability & suitability

With a hardness of 5 on the Mohs scale, apatite is considered a relatively soft gemstone compared to many commonly used jewelry stones. While it can be used in jewelry, it is best suited for designs that minimize exposure to impact, such as pendants, earrings, and protected settings.
Apatite is generally not recommended for everyday rings due to its lower hardness and susceptibility to scratching. Its vivid color and visual appeal, however, make it an excellent choice for expressive, occasional-wear jewelry and distinctive statement pieces where careful handling can be ensured.

Treatments & authenticity

Apatite is commonly found without the need for enhancement. In some cases, heat treatment may be applied to improve color clarity or stability, a practice accepted within the gem trade when properly disclosed.
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 .