DESCRIPTION: Light held in crystal. Clarity given form. This Herkimer Diamond from Herkimer County, New York, brings together a remarkably clear interior and sharply defined natural faces, creating the impression of a jewel shaped by the earth itself. Its colourless transparency is the first attraction. The interior is visibly clean, allowing the eye to follow the meeting of faces and edges through the crystal. Light enters across broad planes, catches along inclined surfaces and returns in bright reflections that shift with every change of orientation. The absence of visible internal inclusions gives this interplay particular clarity. There is an openness to the body that allows the geometry to remain the focus, with overlapping outlines seen through transparent faces. Against a dark background, these relationships become especially expressive: luminous edges frame clear windows, while reflected areas alternate between silver brightness and deep shadow. Its form is compact and substantial, with broad faces and two opposing terminations. The crystal has a strong three dimensional presence, revealing a different arrangement of angular planes as it turns. Some perspectives emphasise the pointed ends; others bring the wider central body forward, showing the breadth of the faces and the precision of their intersections. These natural faces give the specimen its jewel like appearance. Their appeal comes from the relationship between flat reflective planes, sharply defined boundaries and converging terminal surfaces. The resulting geometry offers the visual satisfaction of a faceted object while retaining the individuality of a naturally formed crystal. Fine external marks and localised surface textures remain visible across parts of the exterior. They introduce detail beside the clearer reflective areas and distinguish the surface character from the clean interior. Under changing illumination, these textures become more or less prominent, adding another level of interest to close examination. The name Herkimer Diamond belongs to the distinctive naturally double terminated quartz associated with this New York locality. This specimen expresses that identity through its colourless body, vitreous lustre and opposing terminations. Mineralogically, it is quartz, with its own optical properties and crystalline structure. Its beauty rests in the coherence of these qualities. Transparency reveals the form. Reflections trace the edges. The opposing points complete the silhouette. Together, they give this Herkimer Diamond a refined presence, with clarity and natural geometry carrying the full visual composition. SPECIFICATIONS: • Weight: 0.62 g • Weight in carats: 3.10 ct • Dimensions: 11 × 9 × 8.5 mm • Origin: Herkimer County, New York, USA • Mineral species: Quartz • Variety: Colourless rock crystal • Traditional designation: Herkimer Diamond • Chemical composition: SiO₂ • Crystal system: Trigonal • Crystal habit: Natural double terminated crystal • Crystal proportions: Compact, broad bodied form • Crystal morphology: Defined prism faces with converging terminal faces at opposing ends • Terminations: Two developed opposing terminations • Colour: Colourless • Transparency: Transparent • Internal clarity: No visible internal inclusions • Surface features: Fine external markings and localised surface textures • Lustre: Vitreous, with bright reflections across natural faces • Presentation: Individual crystal without attached matrix • Finish: Natural crystal faces, uncut and unpolished • Treatment: None • Hardness: 7 on the Mohs scale NOTABLE POINTS: • Remarkably Clear Interior The transparent body presents no visible internal inclusions, allowing the natural geometry to remain the principal visual focus. • Classic Double Termination Two opposing terminations establish the recognisable crystalline form associated with Herkimer Diamonds. • Sharply Defined Natural Faces Broad reflective planes meet along distinct boundaries, giving the specimen a precise and expressive appearance. • Compact Crystalline Presence The broad central body gives the crystal substance and a balanced silhouette across several viewing directions. • Colourless Transparency The absence of body colour allows light, reflection and the arrangement of the faces to define its appearance. • Bright Vitreous Lustre Natural surfaces catch the light in clear, glassy reflections that bring individual planes into prominence. • Jewel Like Natural Geometry Converging faces and angular transitions create a refined visual character without artificial faceting. • Engaging Views Through the Crystal Transparency allows opposing edges and faces to be seen through the body, creating overlapping geometric outlines. • Expressive Light and Shadow Rotation shifts the balance between bright reflective surfaces and darker passages, revealing different aspects of the form. • Preserved External Detail Fine surface markings and localised textures provide additional interest alongside the clearer reflective faces. • Classic New York Provenance Herkimer County connects the specimen directly with the locality from which the Herkimer Diamond name derives. • Complete Natural Presentation The individual crystal can be appreciated from multiple directions, with its opposing terminations and principal faces available for examination. COLLECTOR’S INTEREST: This Herkimer Diamond draws its appeal from the relationship between a clear interior and a strongly defined exterior. Transparency makes the form accessible to the eye, while the broad faces and opposing terminations give that clarity a compelling structure. The visibly clean body is particularly important to its presentation. It allows attention to move through the crystal, following edges and terminal faces that overlap in perspective. The result is an engaging sense of depth, with the exterior geometry remaining visible through the transparent interior. Its proportions add another point of distinction. The broad central body gives the specimen a substantial appearance, while the opposing terminations provide direction and balance. Turning the crystal reveals changes in silhouette, from more pointed profiles to wider arrangements of reflective planes. The external details also reward examination. Fine markings and textured passages remain part of the surface, offering contrast beside the brighter faces. Their presence gives the specimen an individual appearance that can be appreciated alongside its internal clarity. For collectors of Herkimer Diamonds, colourless quartz or crystals with well expressed natural geometry, this piece offers a focused combination of transparency, lustre and form. Its appeal is strongest when these qualities are viewed together, with the complete crystal preserved as the central object of interest. LAPIDARY POTENTIAL: The transparent body makes this crystal an attractive subject for jewellery design, particularly in a setting that preserves its natural faces and double termination. Its existing geometry already provides a distinctive outline and a varied arrangement of reflective surfaces. An open pendant setting could leave the broad faces visible and allow light to reach the crystal from several directions. A design fitted to its actual contours would retain the relationship between the central body and opposing points, while protecting the more exposed terminations. Conventional faceting would replace this natural architecture with a different form. Any such decision would require direct assessment of the crystal, but its current appearance already offers the qualities that make it engaging: a clear interior, bright natural faces and a recognisable double terminated silhouette. Preserving the specimen retains those qualities together. As a display crystal or the centre of a carefully designed setting, this Herkimer Diamond can express its clarity and geometry in the form in which they developed. ——————— Shipping and Handling: All orders are shipped by Portuguese National Post or UPS. • Dispatch time: within 1 to 3 business days after payment confirmation to Catawiki • Transit time service: between 2 to 5 business days within europe and worldwide, depending on destination national post. • A tracking number is always provided Photography and transparency: All photographs are taken under controlled lighting conditions using a macro lens, carefully selected to present each specimen as accurately as possible. No filters, colour enhancement, or artificial saturation are applied. The lighting setup uses a calibrated 5500K light source, replicating neutral daylight to reveal natural tones, surface features, and internal characteristics. Under warmer or weaker indoor lighting, colours may appear slightly different, which is normal. The purpose of this photographic process is documentation and representation, not visual enhancement. Images are intended to reflect the specimen faithfully as it appears under balanced natural light conditions. Identification and ethics: All specimens offered are natural and described to the best of our knowledge, based on direct sourcing, professional experience, and information provided by trusted suppliers working at the origin. Every effort is made to ensure transparency and accuracy regarding identification, locality, and general characteristics, avoiding misleading statements about treatment, provenance, or nature. Customs and import taxes: Any customs duties, import fees, or local taxes applied by the destination country are entirely the responsibility of the winning bidder. These charges are not included in the auction price or shipping cost and are determined by the buyer’s local authorities. Guarantee and resolution: Customer satisfaction is important. In the unlikely event of an issue such as loss, damage, or discrepancy, please contact us promptly through Catawiki’s messaging system. Each case is handled individually and fairly, with appropriate solutions offered when justified. Appreciation and commitment: We sincerely thank you for your trust. Our work focuses on careful selection, accurate representation, and respectful presentation of mineral specimens with character and interest. Each piece is chosen for its individual qualities rather than speculative or financial considerations. We aim to provide a transparent, reliable, and consistent experience for collectors at all levels. With gratitude, GemPulse Minerals