Vivid Purple Fluorite on Quartz from Steinkopf, South Africa

This Vivid Purple Fluorite on Quartz from Steinkopf is a beautifully contrasting specimen, featuring a prominent cluster of deep purple to violet fluorite surrounded by a matrix of translucent to milky-white quartz crystals. The darker fluorite creates an exceptional focal point against the pale quartz, while the multiple viewing angles reveal an intricate arrangement of crystals, natural cavities and mineral growth.

Specimen Details

• Mineral: Fluorite on Quartz
• Chemical Formula: CaF₂
• Locality: Steinkopf area, Northern Cape, South Africa
• Geological Setting: Orange River Pegmatite Belt
• Geological Age: Mesoproterozoic, approximately 1 billion years
• Fluorite Colour: Deep purple to violet
• Quartz Colour: Colourless to translucent white
• Transparency: Translucent to locally semi-transparent
• Crystal Habit: Intergrown fluorite crystals with prominent geometric faces and cleavage
• Associated Mineral: Quartz
• Weight: 87 g
• Size: 77 × 46 × 20 mm (Length × Width × Height)
• Preparation: Professionally cleaned and trimmed
• Display: Ready for display

The Steinkopf area forms part of the Orange River Pegmatite Belt, one of the important rare-element pegmatite provinces of Namaqualand. These ancient pegmatites formed during the Mesoproterozoic, approximately one billion years ago, and their complex magmatic and hydrothermal evolution produced an extraordinary diversity of minerals.

Fluorite is specifically documented from pegmatites in the Steinkopf region, including the Norabees I pegmatite within the Norrabees pegmatite field, where fluorite occurs alongside quartz and a diverse suite of other pegmatite minerals.

The defining feature of this specimen is the dramatic contrast between the deep violet fluorite and the pale quartz. The fluorite forms a concentrated crystalline zone towards the upper portion of the specimen, with numerous closely packed crystals producing a richly textured surface. Some of the crystals display distinct cubic geometry, while others are partially intergrown, creating a natural progression of faces and edges across the cluster.

The quartz provides an excellent natural backdrop. Its pale, translucent crystals surround and partially frame the fluorite, allowing the purple colour to immediately capture attention. Small areas of warm orange-brown mineralisation can also be seen within parts of the matrix, adding subtle additional colour to the otherwise predominantly white and purple specimen.

The reverse and side views reveal that the fluorite cluster is integrated into a much broader quartz-rich formation. This makes the specimen particularly interesting from a mineralogical perspective, as it illustrates the close association between fluorite and quartz within the mineral-rich pegmatitic environment of the Steinkopf region.

At 87 grams, this is a compact specimen with an excellent display footprint. Its relatively low profile makes it easy to position in a mineral cabinet while the elevated fluorite cluster provides a natural focal point when viewed from the principal display angle.

Fluorite has a Mohs hardness of approximately 4 and possesses perfect octahedral cleavage, so it should be handled carefully and protected from impacts and abrasion.

Bring this captivating piece of Steinkopf mineralogy into your collection and enjoy the dramatic meeting of deep violet fluorite and luminous white quartz in a specimen with remarkable natural contrast.