Description
Natural Dogtooth Calcite Crystal Spar Specimen
This striking Dogtooth Calcite crystal specimen displays the classic scalenohedral crystal form that gives this mineral its distinctive name. Often referred to as “Dogtooth Spar,” the sharply pointed crystal structures resemble elongated triangular teeth, forming dramatic clusters that stand out in mineral collections and geological displays.
The specimen has been carefully selected for its well-defined crystal shapes and natural mineral structure. The angular crystal faces catch and reflect light across the surfaces, highlighting the geometry typical of calcite crystals formed under favourable geological conditions.
The photographs show the exact specimen you will receive. Full sizing and scale can be clearly seen in the listing images so collectors can appreciate the crystal formation and proportions of the piece.
This crystal is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card confirming authenticity.
Mineral Identification and Geological Classification
Dogtooth Calcite is a crystal habit of the mineral calcite, composed of calcium carbonate with the chemical formula CaCO₃. Calcite is one of the most widespread minerals found in the Earth’s crust and forms in sedimentary, metamorphic, and hydrothermal environments.
The term “Dogtooth Spar” refers specifically to calcite crystals that develop in the scalenohedral crystal habit. These crystals form elongated pyramidal shapes with pointed terminations that resemble canine teeth, giving rise to the traditional name used by mineral collectors.
Calcite commonly forms in limestone deposits, hydrothermal veins, and cavities within sedimentary rocks. When mineral-rich groundwater flows through these cavities, calcite crystals can slowly grow into open spaces, producing well-formed crystal clusters like those seen in Dogtooth Calcite specimens.
Crystal Structure and Physical Properties
Calcite crystallises in the trigonal crystal system and can form a wide variety of crystal shapes including rhombohedrons, scalenohedrons, and prismatic forms. The Dogtooth variety specifically develops elongated scalenohedral crystals that taper to pointed tips.
Typical mineral characteristics include:
Mineral species: Calcite
Chemical composition: Calcium carbonate (CaCO₃)
Crystal system: Trigonal
Crystal habit: Scalenohedral “Dogtooth” formations
Colour: Often colourless, white, honey, grey, or slightly tinted depending on mineral inclusions
Lustre: Vitreous to pearly
Transparency: Transparent to translucent
Mohs hardness: Approximately 3
Calcite is also known for its strong optical birefringence. In transparent specimens, light passing through the crystal can appear doubled due to the mineral’s internal optical structure.
Geological Formation of Dogtooth Calcite
Dogtooth calcite crystals commonly develop in hydrothermal environments and limestone cavities. In these environments, mineral-rich fluids containing dissolved calcium carbonate move through fractures and cavities within rock formations.
As the water cools or evaporates, calcium carbonate begins to crystallise along the cavity walls. When conditions allow sufficient open space, crystals can grow freely into the cavity, forming the elongated scalenohedral shapes characteristic of Dogtooth Calcite.
These crystals often grow in clusters where multiple crystals radiate outward from a central growth point. Over long geological periods, continued mineral deposition can produce impressive crystal groups with sharp points and well-defined surfaces.
Many high-quality Dogtooth Calcite specimens originate from mineral-rich limestone deposits and hydrothermal veins found in regions such as Mexico, China, the United States, and parts of Europe.
Collector Appeal and Display Value
Dogtooth Calcite is highly appreciated by mineral collectors due to its distinctive crystal habit and dramatic geometry. The sharply pointed crystals create a visually striking specimen that contrasts with the smoother forms of many other minerals.
The reflective crystal faces produce attractive highlights when displayed under natural or artificial lighting. This makes Dogtooth Calcite particularly suitable for mineral cabinets, geological collections, display shelves, or educational exhibits.
Each specimen forms naturally and therefore exhibits unique crystal arrangements, surface textures, and subtle colour variations depending on the geological environment in which it formed.
In some cultural traditions, calcite crystals are traditionally associated with decorative spiritual environments or meditation spaces. These interpretations are cultural in nature, while the primary interest of the specimen lies in its geological formation and mineralogical characteristics.
Specimen Authenticity and Selection
This Dogtooth Calcite crystal spar specimen has been carefully selected for its crystal structure and overall display quality. The photographs in the listing show the exact specimen you will receive, allowing you to examine the crystal formation and natural features prior to purchase.
Full dimensions are visible in the listing photos to provide accurate scale reference. Natural mineral specimens may display small variations in crystal shape, clarity, and surface texture due to the geological processes involved in their formation.
Your specimen will be supplied with a Certificate of Authenticity lifetime guarantee generic card confirming that the crystal is a genuine mineral specimen.
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