Take a walk-around look at a mineral specimen I call the Tugboat. It’s a doubly-terminated smoky quartz with milky quartz frosting. The crystal sporys a mass of very purple lepidolite out of which grew several gem tourmaline. Possibly 3 kg, this floater comes from the Oceanview Mine Kahuna pocket zone - probably the most colorful pocket area they’ve ever mined. #geology#pegmatites#quartz#tourmaline
Microsoft inches closer to glass storage breakthrough that could finally make ransomware attacks impossible in the data center
the quartz glass is suitable for a host of sensitive industries including finance, scientific research and healthcare, due to the secure nature of archival glass storage
In a garden in #Guernsey, could this be the capstone of F.C. Lukis' "lost" cist that he excavated in the mid 1800s. He reported some finds, but the exact location has been lost for over 100 years. If this is indeed the same site, it consists of a huge single #capstone lying on a hill, with many orthostats lying nearby in the walls, of the favoured high #quartz content #granite by the builders. Discovery by our member Karolus, more on our page: #FindsFridayhttps://www.megalithic.co.uk/article.php?sid=59201
People #MERCURY IS NOT A MINERAL! there is no other choice except #Calcite. Even if you do pretend that non-naturally occurring, non-crystaline, non-solid mineraloids are a "mineral" (which they literally aren't and that's why they are called mineraloids), calcite is still the clear winner because without #quartz in the game, it is the other heavyweight. Calcite is just amazeballs! #MinCup23
Vote early, vote once (trying hard to not vote more than once on this one) https://www.mineralcup.org/results/round-2-match-5
Currently a competitor in #MinCup23, #Quartz is a #crystalline form of silicon dioxide (#SiO2) with a trigonal #crystal system that, ideally, results in the growth of a hexagonal column with pointed ends, but nature rarely allows this, as this #Macro#image demonstrates.
#quartz is an excellent preserver of tiny pockets of fluids that were present when the host quartz formed or recrystallized — these little bubbles in a subducted quartz sediment could be sample of a Cretaceous ocean! #MinCup23
The Bandelier Tuff (New Mexico) ejected perhaps 800 cubic km of magma and rock in two events a little over 1 million years ago.
Trace elements in #quartz make it glow in an electron beam (cathode luminescence). The outer bright blue rims in CL record crystallization temperatures (from Ti concentrations) abruptly 100°C hotter than before: magma recharge triggering a #supereruption.
I got these #quartz crystals at a Flohmarkt in Berlin so I don’t know where they are geologically from but I could not resist their symmetry. #MinCup23
#MinCup23 quartz vs stibnite. I like them both, but today I'm going for quartz. I did some work in Mozambique in 2011, and here's a couple of beautiful quartz crystals in, and outside , the geological museum in Maputo. 🥰 🤩 #Quartz
So it's #quartz against #stibnite today in this second round of #MinCup23. For me, my decision is crystal clear: #Quartz for the win. These are stbnite and some quartz single crystal exhibits from the mineral collection at University of Münster.