Natural reddish orange Topaz · 18.54 ct · Pear · Mixed Cut · Irradiated · Brazil

$7 947.59

Natural Topaz weighing 18.54 ct, displaying a striking brownish reddish-orange colour in an elegant pear-shaped mixed cut. Measuring 19.3 × 13.6 × 9.6 mm, this transparent gemstone shows a VS clarity profile, very good cutting, excellent symmetry and excellent polish. Its warm reddish-orange appearance is reminiscent of colour ranges often associated with Imperial-type Topaz, although this specimen’s colour has been enhanced by irradiation. Brazil origin, NGB certified.

1 in stock

NGB Reference: NGB-000883 SKU: FA-NGBTO24CT-001-101 Category: Brand:
Secure Payments - Local Payment Methods Available at Checkout
Why Buy From Natural Gems Belgium?
  • 100% natural Gemstones
  • Expert Selected & Verified
  • Secure Payments
  • Carefully Packed & Shipped
  • Worldwide Delivery

This natural Topaz weighs an impressive 18.54 carats and is fashioned in an elegant pear-shaped mixed cut, combining substantial size with a refined faceting arrangement designed to enhance brightness, colour distribution and overall optical performance.

Measuring approximately 19.3 × 13.6 × 9.6 mm, the gemstone has a strong face-up presence and generous depth, making it particularly suitable for a statement jewellery design or a substantial gemstone collection.

The stone displays a distinctive brownish reddish-orange colour, with visible red, orange and brownish-orange components that create a warm and complex overall appearance. Depending on the viewing angle and lighting conditions, the faceting may produce lively reddish and orangy flashes across the transparent body.

The colour of this gemstone has been enhanced by irradiation. This treatment must be considered an integral part of the gemstone’s identification and is disclosed clearly as part of its product documentation. Although the resulting colour may visually resemble tones sometimes associated in the trade with brownish or imperial-type Topaz, this specimen should not be represented as untreated Imperial Topaz.

The gemstone is transparent and presents a clarity comparable to approximately VS, with only relatively limited natural inclusions or internal structural features visible under magnification. These characteristics have only a minor influence on the overall transparency and optical appearance.

The pear mixed cut has been executed to a very good cutting standard, with excellent symmetry and excellent polishing contributing to a highly refined surface presentation. The strong polish enhances the gemstone’s characteristic vitreous luster, while the balanced facet arrangement supports good brightness and attractive internal reflections.

Topaz belongs to the orthorhombic crystal system and is known for its high transparency, strong vitreous luster and ability to accept an excellent polish. Its perfect basal cleavage requires care during cutting, setting and long-term jewellery wear.

This specimen is recorded as originating from Brazil, one of the world’s most important sources of gem-quality Topaz.

With its substantial 18.54 ct weight, warm reddish-orange colour, high transparency and refined pear-shaped faceting, this Topaz offers strong visual presence and distinctive character. Its excellent symmetry and polish make it particularly attractive for custom statement jewellery or for collectors seeking a large, documented and clearly disclosed treated Topaz.

Overall Score: 93/100

NGB Grade: Excellent

Quality Evaluation

Color19.0/20
Clarity18.0/20
Cut18.0/20
Optical Performance19.0/20
Overall Appeal19.0/20

Evaluation Notes

This natural Topaz presents an **excellent overall gemmological quality profile**, combining substantial carat weight, high transparency and a relatively clean **VS clarity profile** with strong optical presence. The pear-shaped mixed cut is well executed, with **very good cutting, excellent symmetry and excellent polish** supporting efficient light return, refined surface finish and strong face-up brilliance. The brownish reddish-orange colour is visually striking, although it reflects an **irradiated colour state** and should therefore be assessed separately from naturally occurring Imperial-type colour. Overall, the combination of transparency, clarity, cutting precision, polish and visual impact supports an excellent **93/100** assessment.

Species

Topaz

Gemstone Variety

Topaz

Gemstone Sub-variety

Imperial Topaz, Orange Topaz

Color

Orange

Shape

Pear

Cut

Mixed Cut

Treatment

Irradiated

Origin

Brazil

Transparency

Transparent

Gemological Properties

Carat Weight18.54 ct
Dimensions19.3 × 13.6 × 9.6 mm
TransparencyTransparent
ClarityVS
Refractive Index1.609–1.643
Specific Gravity3.49–3.57
Hardness8 Mohs
Birefringence0.008–0.010
Crystal SystemOrthorhombic
Dispersion0.014
LusterVitreous
Color Descriptionbrownish reddish orange
Transparency NotesTransparent; assessed together with the specimen-specific clarity and internal characteristics.
Natural CharacteristicsFine natural inclusions, subtle internal growth features and minor structural variations may be visible under magnification, consistent with a **VS clarity profile**. These characteristics have limited impact on the gemstone’s high transparency and overall face-up appearance. The stone retains strong visual depth and brightness, while the brownish reddish-orange colour reflects the treated colour state of the specimen rather than a natural inclusion-related feature.

Reviews

There are no reviews yet.

Be the first to review “Natural reddish orange Topaz · 18.54 ct · Pear · Mixed Cut · Irradiated · Brazil”

Your email address will not be published. Required fields are marked *