Natural amethyst, 23.05 carats, oval concave cut, clarity: eye clean, violetish purple color, 20.08 × 16.63 × 12.00 mm, ČGL certified

Natural Amethyst 23.05 ct – Purple, Oval Cut, Untreated, ČGL Certified

Name: Natural Amethyst 23.05 ct – Purple, Oval Cut, Untreated, ČGL Certified
Brand: SOSNA Gems & Jewellery
SKU: AM0033GR1
Price: 9545.00 CZK
Availability: InStock

9.545,00 CZK

Speak with expert

Gemstone Specification

Carat Weight 23.05

Dimensions 20.08 x 16.63 x 12.00 mm

Color Violetish Purple

Clarity Eye Clean

Shape Oval

Treatment No Treatment

Certification ČGL - Czech Gemological Laboratory Certificate (EU)

This natural Amethyst weighs 23.05 carats and is expertly fashioned in a stunning oval concave cut, measuring 20.08 × 16.63 × 12.00 mm. The gemstone displays a rich violetish purple color with excellent transparency and clarity graded as eye clean, showing no inclusions visible to the naked eye. The precision concave faceting dramatically enhances brilliance and light performance, creating exceptional sparkle and visual depth that distinguish this gemstone from traditionally faceted amethysts.

Certified by the Czech Gemological Laboratory (ČGL), this gemstone has been independently verified as natural quartz of the amethyst variety. The combination of substantial size, eye-clean clarity, vivid violetish purple color, and premium concave faceting makes this gemstone particularly desirable for collectors and bespoke jewelry creations. Its remarkable optical performance and impressive dimensions make it an outstanding centerpiece stone for statement rings, pendants, and high-end custom jewelry.

Natural Amethyst 23.05 ct – Purple, Oval Cut, Untreated, ČGL Certified

9.545,00 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.

Loose gemstone

Bespoke jewelry

Selected gemstones may also serve as the starting point for a bespoke piece.
Each design is developed individually, guided by the stone, its proportions and natural character.

Explore bespoke jewelry

Insured Express Delivery

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.

Secure & Trusted Purchase

Protected payments, professional handling, and client confidentiality.

Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Amethyst is a violet to purple variety of quartz, recognized for its natural color range and consistent availability in gem-quality material. Within the quartz family, it is one of the most established and historically used gemstones, appreciated especially in larger sizes where color distribution and clarity can be fully evaluated.
Chemically composed of silicon dioxide (SiO₂), amethyst belongs to the silicate mineral group and crystallizes in the trigonal crystal system. In gem-quality specimens, it typically displays a vitreous luster and transparent clarity.
The refractive index of amethyst generally ranges from 1.544 to 1.553, resulting in a soft, balanced brilliance rather than sharp sparkle.
Amethyst is mined in several regions worldwide, with typical sources including Brazil, Uruguay, Zambia, and Madagascar, each known for slightly different color characteristics.

Durability & suitability

With a hardness of 7 on Mohs scale, amethyst offers solid durability suitable for everyday jewelry when properly set and worn with standard care. It performs reliably in a wide range of designs, particularly in pendants, earrings, and bracelets, where the stone is less exposed to direct impact.
While amethyst can be used in rings, it is best suited for settings that provide adequate protection, especially for larger stones. Its combination of durability, availability in generous sizes, and visually calming color makes it a versatile choice for both everyday pieces and more expressive, statement-oriented jewelry designs.

Treatments & authenticity

Amethyst is commonly found in nature without the need for enhancement. In some cases, gentle heat treatment may be applied within the gem trade to stabilize or refine color, a practice that is widely accepted when properly disclosed.
Any treatments or enhancements are always clearly stated for each individual gemstone. Every stone is professionally examined, and transparent disclosure is considered 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 .