Quartz with Dogtooth Calcite

Description

Broad translucent grey Quartz crystals rise above smaller points, with pale Dogtooth Calcite clustered around the base. Dark internal detail, reflective faces and textured surfaces give this upright specimen a distinctive display.

This self-standing cabinet specimen can be displayed without a separate stand. The translucent grey crystals show darker internal detail, with both reflective and textured surfaces visible in the photographs.

Locality supplied: Guizhou Province, China.

The dogtooth description refers to the pointed, elongated Calcite habit. These tapering crystals create a more directional silhouette than broad tabular Calcite. Their arrangement in the group is especially important: the points give the specimen its outline, while the spaces and contact areas between them bring depth to the display.

The accompanying Calcite contributes a different crystal habit and surface character to the specimen. Its lighter or more translucent areas provide a contrast with the other recorded growth, allowing their separate outlines to be followed. The association is worth appreciating as a whole, with the arrangement and contact between the minerals adding detail beyond the featured crystals alone.

Quartz is silicon dioxide, a mineral whose familiar pointed crystals develop as material is added to growing faces. It occurs in many geological settings, including mineral veins and granite-related deposits. The variety of crystal lengths, orientations and degrees of transparency makes it an especially rewarding mineral to compare: pieces with the same composition can have very different natural architecture.

The glassy lustre of Quartz comes from light reflecting off its surfaces. Clear areas allow a view into the crystal, while internal fractures, veils and inclusions can scatter that light and create softer white regions. These features are distinct from the outer crystal faces. Studying both the interior and the outline adds another layer of interest beyond the familiar pointed shape.

The recorded origin is Guizhou Province, China. Within a collection of Quartz specimens, this locality gives the piece a geographical identity alongside its particular crystal habit and natural setting.

The specimen measures 8 × 7 × 6 cm, with a recorded weight of 227 g. The proportions give a useful guide to its place in a display, with the individual crystal arrangement and mineral association remaining the principal points of interest.

For display, support the stable base or the supplied mount rather than a projecting crystal. Quartz is relatively hard, but pointed ends and natural contact areas can still be damaged by an impact. Gentle handling helps preserve the arrangement that gives this individual specimen its character.