Scholzite with Cryptomelane

Scholzite with Cryptomelane from Reaphook Hill, Martins Well, South Australia, Australia, measuring 130 × 85 × 60 mm and weighing 795 grams. Its scale gives the phosphate association a substantial cabinet presence. Its recorded association brings together a zinc-bearing phosphate and a manganese oxide, providing a broader mineralogical subject than Scholzite alone.

Scholzite is a hydrated calcium zinc phosphate, and Reaphook Hill is a recognised Australian occurrence for the species. Cryptomelane is a potassium-bearing manganese oxide. The two names point to distinct components within the supplied assemblage, inviting a collector to consider the range of elements present through a phosphate-and-oxide association with fine-scale visual detail.

Fine white sprays stand out against dark areas and rusty-toned matrix. The change from broad matrix to small radiating groups gives the specimen a useful sense of scale: its cabinet presence is substantial, yet much of the attraction is in details that invite a closer view. Positioning those pale sprays toward the light helps make their structure easier to appreciate. The provenance names Chris Johnston of Adelaide Gem Co. and the Anne McDonald Collection. Both connections are retained as part of the specimen's history, alongside the Reaphook Hill locality. For an Australian phosphate collection, the combination of substantial size, a recognised Scholzite locality and those documented names gives this piece a particularly coherent story.