Kolwezite druzy quartz DR Congo Ref 529

Beautiful pairing of kolwezite and druzy quartz: the tiny quartz crystals create a fine sparkle that highlights the rounded shapes of the kolwezite. The ensemble offers a lovely play of light, perfect for display and easy to enhance under soft lighting.

The drusy surface (a “skin” of micro-quartz crystals) catches the light, while the kolwezite, in nuanced green tones, adds depth. This glossy/matte alternation makes the piece easy to read at a glance, even for beginners.

From the Kolwezi district (Province of Lualaba, DR Congo), this composition is appreciated by collectors for its visual contrast and decorative appeal. It fits naturally on a shelf or in a small display cabinet, alone or alongside other light-colored minerals.

Care tip: since kolwezite is softer than quartz, prefer dusting with an air blower or a very soft brush. Avoid acidic products and vigorous rubbing.

✅ Mineralogical Information

Main species: Kolwezite

Name: Kolwezite

- Chemical formula: (Cu,Co)₂CO₃(OH)₂ (copper and cobalt can partially substitute for each other)

- Color: Pale green to emerald green (sometimes bluish depending on the Cu/Co ratio)

- Luster: Silky to dull on finely fibrous surfaces.

- Hardness (Mohs): 4 to 4.5

- Density: ~4.1 to 4.3 g/cm³ (may vary with cobalt content)

Associated: Quartz (druzy)

- Formula: SiO₂

- Hardness (Mohs): 7

- Density: 2.65 g/cm³

✅ Shipping

All orders are shipped within 24 hours, except in special cases requiring extra protection (excluding weekends and public holidays). We pay close attention to packaging to ensure optimal protection.