RARE lot of 20 Herkimer Diamonds — 4.30 carats Exceptional clarity - NO RESERVE PRICE- 0.86 g - (20)

Exceptional lot of 20 natural Herkimer diamonds, showcasing a remarkable selection of microcrystals measuring roughly 4 to 5 mm. The rarity and interest of this set reside as much in the number of specimens gathered as in the extraordinary diversity of their architectures: natural terminations, bright faces, geometric silhouettes, zones of notable transparency, and complex internal structures follow one another from crystal to crystal.

Some appear almost crystal-clear, while others contain veils, inclusions, natural fractures, and growth figures that tell the different stages of their formation.

Gathering 20 individuals so tiny yet perfectly individualized allows for observing a true collection of crystalline morphologies, each a uniquely shaped piece formed naturally.

With only 4.30 carats for the whole, each crystal weighs on average about 0.215 carat, making their level of detail particularly striking at this scale.

These are extremely rare biterminated quartz specimens, sought under the name “Herkimer Diamonds” for their characteristic natural morphology, transparency, and luster.

Specifications

- Collection name: Herkimer Diamonds
- Number of specimens: 20
- Mineral nature: Natural biterminated quartz
- Origin: Pakistan
- Total weight: 4.30 carats
- Average weight: ≈ 0.215 carat per specimen
- Dimensions: About 4 to 5 mm per specimen
- Morphology: Natural biterminated crystals with varied shapes
- Color: Colorless to very lightly tinted depending on the individual
- Transparency: Transparent to locally translucent
- Luster: Vitreous, particularly intense on certain faces
- Crystallization: Entirely natural
- Terminations: Natural
- Internal structure: Veils, inclusions, natural fractures and growth figures
- Condition: Natural, uncut
- Interest: Mineral collection, crystallography, macrophotography and magnified observation

20 crystals, 20 unique architectures

The main appeal of this lot lies in the possibility of simultaneously observing twenty different expressions of the same natural crystallization. Despite similar sizes, no specimen is truly identical. Some develop very regular, highly geometric silhouettes, while others exhibit more complex or irregular constructions. The proportions of the terminations, the arrangement of faces, and internal structures vary continuously. The lot thus forms a genuine miniature comparative collection, particularly interesting for observing the diversity that nature can produce at a scale of only a few millimeters.

Extraordinary complexity at the scale of a few millimeters

At 4 to 5 mm, each specimen concentrates an astonishingly elaborate architecture. The transparent faces allow observation of different depths inside the crystals. Reflective planes, natural microfractures, veils, and inclusions can appear depending on the light direction. This richness becomes even more spectacular under a loupe or macro photography: what seems to be a tiny crystal to the naked eye becomes a true mineral landscape when viewed under magnification.

Only 0.215 carat average per crystal

The lot shows a total weight of 4.30 carats distributed among 20 specimens, i.e., only 0.215 carat on average per crystal. This extremely small mass emphasizes how miniature these crystallizations are. Nevertheless, each individual has its own faces, terminations, proportions, and internal peculiarities. This concentration of details in a few tenths of a carat is precisely one of the major attractions of this selection.

A fully natural geometry

The almost cut look of several crystals is one of their most fascinating characteristics. Their facets and terminations are not the result of lapidary work: they correspond to their natural crystal growth. Under directional lighting, some faces become true mirrors while others remain transparent, producing spectacular changes in appearance as the specimens are moved. It is this combination of geometry, transparency, and luster that historically contributed to the fascination of crystals known as Herkimer Diamonds.

A geological history recorded inside the crystals

Each internal structure also leaves a trace of the specimen’s growth. During formation, environmental variations can leave behind different signatures: inclusions, veils, healed fractures, or changes in growth phases. Each crystal thus becomes a miniature mineral archive. The presence of 20 different specimens makes this set especially interesting: it allows comparing as many distinct growth histories within the same lot.

The history of the “Herkimer Diamonds”

The name “Herkimer Diamond” is historically associated with the famous biterminated crystals discovered in Herkimer County and surroundings in New York State. Their remarkable luster and their strongly faceted natural forms gradually led to them being compared with diamonds, before this name became extremely well known in the world of mineral collecting. Comparable biterminated crystallizations do exist in other parts of the world. The historical appellation should therefore be distinguished from the actual geographic origin, clearly indicated in the characteristics of this lot.

A true miniature collection

With 20 natural crystals gathered, this lot surpasses the appeal of an isolated specimen. It allows sequential study of variations in shape, transparency, luster, and internal structure while maintaining a remarkable visual coherence. Under a loupe, microscope, or macro objective, each one gradually reveals its own particularities.

20 natural specimens – 4.30 carats total – about 0.215 carat per crystal – only 4 to 5 mm: a remarkable miniature collection gathering twenty unique crystalline architectures.

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