Quartz with Hematite

specimen number:
8311340

location:
Orange River, Northern Cape, South Africa

description:
Lustrous slightly translucent red crystals of quartz measuring to 2.5 cm in length across the top of matrix. In good condition with very minimal damage present. The red color is due to the presence of hematite.

The Orange River region, spanning the border between South Africa and Namibia, is a world-renowned locality for highly aesthetic and colorful quartz specimens. Geologically, these crystals are found within pockets and fractures of ancient metamorphic rocks and volcanic suites, where hydrothermal activity allowed for the slow growth of quartz clusters. This area is particularly famous for its "hematoid" quartz, which features vibrant orange, red, and brown hues caused by the inclusion of iron oxides like hematite or goethite during the crystallization process. These inclusions often form distinct phantoms or a pervasive coating that gives the crystals their signature earthy glow. Historically, mining in this rugged and arid landscape has been conducted primarily by artisanal miners who navigate the rocky terrain to recover these specimens by hand.

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