#cuprite — Public Fediverse posts

@publicdomainrev since #MineralCup2026 has cuprite (red copper oxide) against orpiment (yellow arsenic sulphide) today, I'm going to guess at the pigment prominent in that illustration as orpiment.
#orpiment #cuprite

A unique sample of #Cuprite looking a little like a translucent red Lego castle.

#MinCup26 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology #geosky #GIS 🍎 🪐 🔭 🌋

#MinCup26 Round 1 Match 5
It's a fiery match of vibrant red #Cuprite and just as saturated orange #Orpiment battle for your votes!

VOTE: https://www.mineralcup.org/2026/vote-results/vote-r1m05
RESULTS: https://www.mineralcup.org/2026/vote-results/results-r1m05

Much shinier (aka 'gemmy') than the last one - this 4mm cubic #Cuprite is from #MineWaste at Wheal Unity Wood - a mile or two away from Wheal Unity. A lot of these #Cornish mine names and distinctions are famously confusing!

Recently I've been making better images of specimens I found previously - this is a pair of complex #Cuprite crystals from #MineWaste at Wheal Unity, Gwennap I found in a 20 minute visit in 2023 checking sites for #OrganisedAtoms workshops (I should check it out again, found some amazing things here and somehow never returned). They have a thin coating of #Chrysocolla which gives them a hint of blue.

I'm still using the same cheap USB microscope, but I learned how to use Hugin (https://hugin.sourceforge.io/) better to make large resolution images. This is a composite image of 9 focus stacked images - each comprised of 10 to 20 images at different focal depths.