Dioptase Crystal Specimen

Description

A richly grouped cluster of deep green Dioptase crystals, with larger prismatic faces rising above smaller intergrown crystals. Brighter emerald edges and a natural dark matrix bring out its depth from different angles.

From the N’tola Mine in the Mindouli District of the Republic of the Congo, this thumbnail collector specimen presents a dense arrangement of green crystals on a contrasting natural matrix. The clear acrylic plinth presents its textured face, while the protective box keeps it ready for a compact mineral display. The exact specimen shown in the photographs is the one you will receive.

Dioptase is delicate; handle the plinth rather than the crystals and protect the specimen from knocks.

Dioptase is a hydrated copper silicate, distinct from emerald despite its striking green colour. It forms in the oxidised zone of some copper deposits and is particularly appealing when its glassy crystal faces remain exposed. The combination of strong colour and clearly crystallised growth gives it a recognisable place among copper minerals.

A Dioptase group rewards attention to both the larger faces and the smaller crystals between them. Changes in viewing angle can turn a dark surface into a bright reflection without changing the mineral itself. Its crystal arrangement, distribution over the matrix and overall silhouette help distinguish one piece from another. These are the features that give a cluster its individual display character.

The recorded origin is N’tola Mine, Mindouli District, Pool Department, Republic of the Congo. Within a collection of Dioptase specimens, this locality gives the piece a geographical identity alongside its particular crystal habit and natural setting.

The specimen measures 3.5 × 3 × 2 cm. Its compact presentation makes it suitable for a boxed mineral collection, where the individual crystals and their association can be appreciated at close range.

Dioptase crystals and their contact areas can be fragile. Support the matrix or display base, avoiding pressure on exposed crystal edges. A stable indoor display is well suited to appreciating the green colour and glassy reflections without frequent handling.