#hisingerite

[kindnessandgoodness]

My most recent display specimen! A huge drusy quartz surrounded by crystal quartz, calcite, and hisingerite, a mineral found only in Washington. The entire specimen is about 15 inches tall and 12 pounds.

[livefreeshop]

Abstract: Investigations with the CheMin Xray Diffractometer (XRD) onboard the Curiosity rover in Gale Crater demonstrate that all rock and soil samples measured to date contain approximately 15-70 weight percentage X-ray amorphous materials. The diffuse scattering hump from the X-ray amorphous materials in CheMin XRD patterns can be fit with a combination of allophane, ferrihydrite, and rhyolitic and basaltic glass. Because of the iron-rich nature of Mars' surface, Fe-rich poorly-crystalline phases, s... from New NASA STI https://go.nasa.gov/2Go9dvf