RARISSIME Herkimer Diamond — 7.02 carats Exceptional clarity - NO RESERVE PRICE - Height: 15 cm - Width: 10 cm- 1.4 g - (1)

Discover this exceptional natural Herkimer diamond of 7.02 carats, a magnificent mineralogical specimen distinguished by its double-terminated crystallization, its fine transparency, and the complexity of its natural architecture.

This crystal displays a particularly elegant morphology, characterized by two opposite terminations, broad crystalline faces, and a long, harmonious silhouette. Its remarkable geometry testifies to the specific conditions required for the formation of these crystals, whose growth can occur freely at both ends.

One of the most captivating aspects of this piece lies in its extraordinary visual richness. Its naturally faceted surfaces catch the light and produce numerous reflections, while its transparency allows observation of a fascinating internal universe, composed of fine inclusions, crystalline veils, and natural fractures.

A particularly interesting feature appears at the heart of the crystal: delicate iridescences in multicolored hues, visible from certain angles, which add an extra dimension to its aesthetics. These reflections result from natural optical phenomena related to the reflection and interference of light within certain internal structures.

With its 7.02 carats and dimensions of 15 × 10 × 7.4 mm, this specimen has a remarkable presence. Its elongated shape highlights its crystalline terminations and allows appreciation of the complexity of its many natural faces.

The formation of double-terminated crystals requires a particular geological environment where the mineral has enough space to develop freely at its ends. Specimens displaying beautiful transparency, expressive terminations, and such seductive geometry are particularly sought after by crystallography and mineral collection enthusiasts.

The history of Herkimer diamonds goes back to the famous discoveries in Herkimer County, New York, USA. These crystals gained international fame thanks to their natural brilliance, transparency, and striking resemblance to faceted gemstones. Their historical name evokes this mineralogical tradition, today known to collectors around the world.

This magnificent specimen is a remarkable natural two-ended quartz crystal, whose geometry, transparency, and internal structures illustrate the complexity of this crystallization type. The commercial name “Herkimer diamond” denotes here a Herkimer-type crystal and not a true diamond.

Technical specifications

- Trade name: Herkimer Diamond (Herkimer-type)
- Mineralogy: Natural double-terminated quartz
- Provenance: Pakistan
- Weight: 7.02 carats (1.404 grams)
- Dimensions: 15 × 10 × 7.4 mm
- Color: Colorless, with slight internal nuances
- Transparency: Transparent to translucent depending on the area
- Crystallization: Natural, double-terminated
- Morphology: Elongated crystal with natural geometric faces
- Luster: Vitreous, with numerous luminous reflections
- Special features: Fine internal iridescences, inclusions and natural crystalline structures
- Condition: Natural raw crystal
- Hardness: 7 on the Mohs scale
- Treatments: No treatments declared
- Use: Geological, crystallography, and display collection

The fascinating history of Herkimer diamonds

Herkimer diamonds are among the most iconic crystal formations in American mineralogy.

Their history is closely linked to Herkimer County in New York, where these natural crystals have been known for centuries.

Their transparency and distinctive geometry quickly attracted mineral enthusiasts.

Unlike ordinary crystals with a single well-developed termination, Herkimer diamonds can have two naturally terminated ends.

This feature gives them a particularly recognizable silhouette.

Their name derives from their brilliant appearance and naturally faceted look, visually reminiscent of certain cut gemstones.

The geological origin of these famous American crystals dates back about 500 million years, during the Cambrian period.

At that time, geological processes favored the formation of cavities within certain dolomitic rocks.

These spaces then allowed mineralizing fluids to circulate, promoting the progressive growth of crystals.

When conditions were favorable, some crystals could grow freely, not entirely fixed to a rock wall.

This freedom of growth permitted the formation of opposite terminations.

The resulting geometry is today one of the main features sought after by collectors.

Over time, Herkimer diamonds have gained international reputation. Their natural brilliance, transparency, and diversity of internal structures have made them iconic pieces in mineral collections.

Comparable formations are also found in different regions of the world, where geological conditions allow the development of crystals with a similar morphology.

Specimens with expressive terminations, good transparency, and harmoniously arranged crystal architecture are of particular aesthetic and mineralogical interest.

A remarkable natural crystallization of notable complexity

The morphology of this specimen is one of its main attractions.

Its central body presents a long shape, surrounded by several naturally developed crystal faces.

The two opposite ends form clearly visible geometric terminations, giving the crystal an especially elegant silhouette.

This architecture results from a mineral growth process in which chemical elements organized themselves according to a regular crystal structure.

The natural faces progressively developed according to the surrounding geological conditions.

Temperature, the composition of mineralizing fluids, and the available space influenced the crystal’s growth.

Variations in these parameters can produce significant differences between specimens.

Some faces show particularly regular geometry, while others reveal small irregularities or growth traces.

These particularities bear witness to the crystal’s natural history.

On this specimen, the different faces create successive inclined planes that reflect light in several directions.

The opposite terminations reinforce the visual balance of the whole.

This combination of geometry, transparency, and crystalline complexity gives the specimen a particularly refined aesthetic.

A remarkable transparency and delicate natural iridescences

One of the most fascinating features of this Herkimer diamond lies in the richness of its internal structures.

Light passes through a large part of the crystal, revealing different zones of transparency.

Some regions appear particularly clear, while others show crystalline veils, fine fractures, and small natural inclusions.

This alternation creates a visually deep effect.

Under suitable lighting, the outer faces produce numerous luminous reflections.

Light can also reflect off certain internal structures, revealing details hardly perceptible under uniform lighting.

A delicate multicolored iridescence is notably visible at the heart of the specimen.

This optical phenomenon can appear when light interacts with fine internal fractures.

From certain viewing angles, small color nuances may emerge.

These iridescences provide subtle contrast with the crystal’s overall transparency.

Natural inclusions also contribute to its identity. They may correspond to materials trapped during growth or structures formed during its geological evolution.

Their presence makes each specimen unique. Observing from different angles gradually reveals new details.

The combination of transparency, inclusions, and iridescent reflections makes this crystal a particularly captivating piece.

A fascinating geological formation

The formation of a natural double-terminated crystal requires specific growth conditions.

In some geological cavities, fluids rich in mineralizing elements can circulate and gradually deposit the material needed for crystallization.

When the crystal has enough space, its growth can proceed in several directions.

The natural faces then develop according to orientations determined by the mineral’s crystal structure.

This process can continue for long geological periods.

The chemical composition of the fluids, temperature variations, and changes in surrounding conditions directly influence growth.

These parameters determine, in particular, the crystal’s shape, transparency, and certain internal characteristics.

The presence of inclusions or natural fractures can attest to different stages of its evolution.

Growth variations can also produce irregularities on certain faces.

Each specimen thus has its own architecture.

In this piece, the opposite terminations and the numerous natural faces allow observation of several aspects of this process.

Internal structures add an extra dimension to its mineralogical interest.

This crystal stands as a magnificent testament to natural processes capable of producing such elaborate geometries.

A superb 7.02-carat specimen

With a weight of 7.02 carats, this Herkimer diamond features dimensions particularly appreciable for a collectible piece.

Its 15 × 10 × 7.4 mm allow easy observation of its crystalline morphology and the details of its internal structures.

Its 15 mm length particularly highlights its elongated silhouette.

The opposite terminations reinforce its geometric character.

Main qualities of this specimen:
- Natural double-termination crystallization.
- Elongated silhouette with harmonious proportions.
- Numerous clearly visible crystal faces.
- Good transparency in different zones.
- Particularly attractive luminous reflections.
- Delicate internal iridescences.
- Fascinating natural inclusions.
- Expressive geometric architecture.
- Weight: 7.02 carats.
- Length: 15 mm.

All these characteristics make it a beautiful specimen for lovers of natural crystals and singular mineral formations.

A remarkable piece for demanding collectors

Herkimer diamonds occupy a special place in natural crystal collections.

Their appeal lies in their geometry, transparency, and brilliance.

Specimens with well-developed terminations hold particular interest for crystallography enthusiasts.

The quality of the natural faces and the balance of proportions are also important aesthetic criteria.

This 7.02-carat specimen presents a seductive combination of these characteristics.

Its elongated morphology highlights its two crystal terminations.

Its transparent surfaces reveal numerous internal structures.

The small iridescences visible at the crystal’s heart add an extra feature.

Presented on a discreet stand, this piece can become a particularly elegant element of a mineral collection.

Directional lighting helps emphasize its many faces and reveal its natural reflections.

Its architecture also makes an excellent example of double-terminated crystallization.

A magnificent collectible specimen, especially interesting for lovers of crystal geometry, natural transparency, and remarkable mineral formations.

Conclusion – An exceptional natural 7.02-carat Herkimer diamond

This magnificent natural Herkimer diamond of 7.02 carats, measuring 15 × 10 × 7.4 mm, stands out for its double-terminated crystallization, its beautiful transparency, and its particularly elegant geometric architecture.

Its many natural faces, fascinating inclusions, and delicate internal iridescences give it a remarkable identity.

Light reveals the full complexity of its structure, creating a succession of reflections that highlight its natural beauty.

A superb collectible piece, combining crystal elegance, geological richness, and a unique character, ideal for enthusiasts of exceptional natural specimens.

Terms and Conditions of Sale – MineralsOpals:
At MineralsOpals, your satisfaction is an absolute priority.
All orders are processed with the utmost care, from stone selection to final shipment.

- Shipping & timelines:
Dispatch within 1 to 3 business days maximum, generally the day after the order.
Shipping Monday to Friday (excluding weekends and holidays).
Each package is sent via La Poste with a tracking number provided.
Careful packaging: each stone is protected individually, then placed in a secure rigid carton.

- Guarantee & customer service:
100% of shipments are guaranteed: in case of trouble, we always find a solution.
You purchase with complete confidence: full refund, replacement, or business gesture in case of loss or proven problem.
If you have questions, doubts, or a specific request, you can contact me at any time, I will happily respond as quickly as possible.

Trust & commitment
Each stone is photographed carefully to reflect its natural beauty.
You benefit from personalized follow-up.
My goal: offer you a reliable, humane, and transparent purchasing experience.
Thank you for your support.

Do not hesitate to check our no-reserve auctions to discover other exceptional products and follow us to stay informed about our new offers."