RAREST Herkimer Diamond — 5.80 carats Exceptional clarity - NO RESERVE PRICE - Height: 12 cm - Width: 10.6 cm- 1.16 g - (1)

Exceptional natural Herkimer Diamond of 5.80 carats, selected for the beauty of its crystallization and the remarkable complexity of its architecture. Its compact silhouette features a particularly expressive pyramidal termination, accompanied by broad natural faces that give it the appearance of a carved gem, while its geometry results entirely from its natural growth.

Inside, light meets a succession of veils, reflective planes, and crystalline structures arranged at different depths: depending on the orientation, some zones become almost clear while others reveal a true three-dimensional network of details.

This contrast between transparency, brilliance, and internal complexity gives the specimen a particularly strong personality. The formation of a crystal so complete requires a succession of favorable geological conditions allowing the mineral to develop freely and retain its terminations, which explains the historical interest of these crystallizations among collectors.

This is a rare specimen of double-terminated quartz, sought after under the name “Herkimer Diamond” for its naturally faceted morphology, its brilliance, and its remarkable crystal architecture.

Characteristics

- Collection name: Herkimer Diamond
- Mineral nature: Natural double-terminated quartz
- Origin: Pakistan
- Weight: 5.80 carats
- Dimensions: 12 × 10.6 × 9.5 mm
- Color: Colorless
- Morphology: Natural double-terminated crystal
- Crystallization: Natural
- Luster: Intense vitreous
- Transparency: Transparent to locally translucent
- Internal structure: Complex, rich in natural veils and reflective planes
- Treatment: None
- Cut / Polishing: None – natural crystallization surfaces
- Interest: Collecting specimen, mineralogy and macrophotography

A geometry shaped solely by nature

One of the most striking qualities of this piece lies in its exterior architecture. The upper termination forms a particularly aesthetic point, extended by several geometric facets whose successive orientations produce powerful plays of light.
This morphology can give, at first glance, the impression of a stone that has been worked. Yet the volumes and facets visible correspond to the crystal’s natural crystallization.
With a substantial thickness of 9.5 mm, the crystal also has a remarkable presence despite its millimetric dimensions.

A fascinating internal architecture

The interior is probably the most interesting aspect of this specimen.
Transparent zones allow the eye to penetrate deeply into the crystal before encountering successive internal structures. These reflect and fragment light, creating white and silver flashes and sometimes subtle optical phenomena when the viewing angle changes.
This organization gives the crystal genuine three-dimensional depth: it is not merely about observing its surface, but about progressively discovering several levels of crystal architecture.

5.80 carats for only 12 mm

The ratio between its dimensions and weight also contributes to its character.
With 5.80 carats for 12 × 10.6 × 9.5 mm, it is a compact and relatively thick crystal. This depth allows internal structures to develop visually across multiple planes and greatly enhances its appearance when viewed under directional lighting or with a loupe.
Each rotation thus changes the reading of the specimen.

Traces of a geological history

A natural crystal is a true archive of its formation environment. Its growth can undergo different phases, during which the physico-chemical conditions of the milieu evolve.
These events can leave behind veils, internal fractures, irregularities, or growth figures, all features that definitively individualize the specimen.
It is precisely this complexity that makes this piece particularly interesting: its interior preserves traces of a geological history that is impossible to reproduce exactly.

The history of the “Herkimer Diamonds”

The name “Herkimer Diamond” has a particular history in the world of mineralogy. It derives from the famous double-terminated crystals discovered in Herkimer County and surroundings, in New York State, celebrated for their transparency, brilliance, and naturally faceted appearance reminiscent of a precious stone.
This remarkable morphology gradually made double-terminated crystals of this type highly prized by collectors.
Comparable crystallizations exist in various regions around the world; the exact geographical provenance of this piece is therefore indicated separately in its characteristics.

A piece for the collector

This 5.80-carat specimen combines a very aesthetic silhouette, a pronounced termination, beautiful transparency, and above all an extremely rich internal architecture.
To the naked eye, it already offers a spectacular geometry. Under a loupe or macro lens, it reveals a much more complex universe, composed of planes, reflections, and nested structures that evolve with light.

A true geological miniature, naturally shaped and absolutely unique: no other crystal can reproduce exactly its morphology and internal architecture.

General Terms of Sale – MineralsOpals:

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