Ferruginous quartz cluster Hydroxyapophyllite The pseudo-hexagonal crystals grow similar

The pseudo-hexagonal crystals grow similar to the arms of its namesake snowflake

and some pieces have hollow cores

I call this one "the abalone" due to its shallow oval shape

The specimen is attached to a rock matrix with a few small pockets of malachite

UV reactivity white chalcedony gives a light white fluorescent reaction under 365 nm UV light

Ferruginous quartz cluster Hydroxyapophyllite The pseudo-hexagonal crystals grow similarLocale: Morocco Approx dimensions: 4. 5 x 3 x 3", longest crystal 5. 5 cm Approx weight: 627g Known as red or ferruginous (iron bearing) quartz, this unusual variety of quartz gets its color from iron oxides, typically hematite. The quartz in this specimen initially grew colorless; broken crystals along the edge reveal the quartz crystals have a clear core bordered by a thin top layer of brick red quartz. A change occurred during the growth process