Mineral Cup & Ore Cup

mineralcup.bsky.social

01 October 2026 21:43

Are we going to run a silica mini-cup?

Mineral Cup & Ore Cup

mineralcup.bsky.social

01 October 2026 21:27

#MinCup26 FINALS!!! We have a pair of geometric beauties as deep red #Cuprite is against versatile #Quartz. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Ryan J Hollister

phaneritic.bsky.social

01 October 2026 21:27

The good news about the Piute Fire is that it’s surrounded by a LOT of granitic rocks of several intrusive suites, but the marshy meadows areas in drainages are forested and fairly dry now. Here’s Piute Lake In 2012. Next to a busy trail leading to Crabtree TH. share.watchduty.org/i/122922?ts=...

Louise Dawe

louisedawe.bsky.social

30 September 2026 01:49

I’m team #Quartz all the way in #MinCup26! Under pressure, its SiO₂ framework does not simply shrink: Si–O–Si bridges flex and SiO₄ tetrahedra distort. d’Amour, Denner and Schulz reveal this structural resilience in their 1979 @actacrystb.iucr.org classic: journals.iucr.org/paper?a17323=

☈H^2

goaskascientist.bsky.social

30 September 2026 01:49

As a southpaw who's been drawing since the age of about 3, I've had my pinky (and whatever the outer fleshy part of the palm is called?) covered with "pencil powder" more often than not. Tried and true, a friend to the end, I am proud to go with graphite!!! 🥰👍