Natural Chalcedony · 12.7 ct · Oval · Rose Cut Carnelian

 80,87

Natural Carnelian Chalcedony, 12.7 ct, oval shaped with a distinctive rose cut and warm natural colour. An individually documented gemstone with unique natural character.

1 in stock

NGB Reference: NGB-000890 SKU: FA-CHA024CA-001-004 Category: Brand:
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This natural Carnelian Chalcedony is an individually documented gemstone presented by Natural Gems Belgium with its specimen-specific identification and recorded characteristics. Weighing 12.7 ct, this distinctive specimen combines the warm appearance of natural Carnelian with an elegant oval shape and a refined rose cut.

Carnelian belongs to the chalcedony family and is appreciated for its characteristic warm orange, reddish and brownish tones. In this gemstone, the natural colour and translucency of the material create a rich, organic appearance that is enhanced by the broad facets of the rose cut. Rather than relying on the deep pavilion commonly seen in brilliant-cut gemstones, the rose-cut style uses a faceted upper surface to create gentle reflections and a distinctive vintage-inspired character.

The oval shape gives this 12.7 ct Carnelian a balanced and timeless outline, while its substantial size allows the natural colour and internal character of the chalcedony to remain clearly visible. The combination of shape, weight and rose-cut faceting makes this specimen particularly attractive for collectors, gemstone enthusiasts or as the centrepiece of a bespoke jewellery design.

As a natural gemstone, this Carnelian may display inclusions, subtle colour zoning, internal structures or minor surface features. These characteristics are part of the natural formation of chalcedony and contribute to the individual identity of the stone. No two natural Carnelian specimens are completely identical in colour, pattern or internal appearance.

Natural Gems Belgium presents this gemstone with its individual identification and documented characteristics, allowing the specific qualities of the specimen to remain clearly linked to the stone itself. Its warm colour palette, substantial 12.7 ct weight and distinctive rose cut give this natural Carnelian Chalcedony a combination of visual character and individuality.

Overall Score: 82/100

NGB Grade: Very Good

Quality Evaluation

Color17.0/20
Clarity16.0/20
Cut17.0/20
Optical Performance16.0/20
Overall Appeal16.0/20
Species

Quartz

Gemstone Variety

Chalcedony

Gemstone Sub-variety

Carnelian

Color

Multicolor, Orange

Shape

Oval

Cut

Rose Cut

Treatment

Unheated, Untreated

Transparency

Semi-Transparent

Gemological Properties

Carat Weight12.7 ct
Dimensions21.0 × 15.9 × 5.7 mm
TransparencyTransparent
ClarityI3
Refractive Index1.535–1.539
Specific Gravity2.58 to 2.64
Hardness6.5 to 7 Mohs
Birefringence0.003 to 0.009
Crystal SystemTrigonal
Dispersion0.013
LusterWaxy Appearance - Vitreous Shine
Color Descriptionorange and red lined
Transparency NotesTransparent; assessed together with the specimen-specific clarity and internal characteristics.
Natural CharacteristicsNatural specimen-specific internal characteristics.

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