#calcite | Explore Tumblr Posts and Blogs

necroticboop · 1 year

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💎 shiny rocks make brain go brrrr ✦ dragon scale calcite [x]

#calcite #dragon scale calcite #dragon calcite #crystals #minerals #✦ gifs

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theoldbone · 10 months

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Calcite flower from the Chenzhou Prefecture in the Hunan Province, China. Photo by Tom Spann

#calcite #calcite flower #chenzhou prefecture #tom spann #geology #mineral #specimen

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heartnosekid · 4 months

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honey calcite spheres 🌼 | source

#stim #crystals #honey calcite #rocks #sfw #gold #yellow #rainbow #brown #beige #clear #shiny #orbs #spheres #minerals #calcite #hands #ishy gifs #postish

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geologyin-blog · 5 days

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Natural Calcite crystals “Flowers”

From Rio Grande do Sul, Brazil

Photo: Thomas Spann

#calcite #minerals #crystals #brazil #gemstones #flowers

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roosaurusrin · 4 months

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Captorhinus skulls with pyrite and calcite crystal growth.

Captorhinus were anapsids from the Permian - meaning their skulls did not have the normal fenestration that diapsid reptiles or synapsid mammals have. Named for their hooked snout, these reptiles had a pineal(or "third") eye - a small photoreceptive spot on the top of the skull not seen in the pictures here.

#captorhinus #paleontology #fossils #permian #reptiles #palaeoblr #not dinosaurs #pyrite #calcite

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vugnasmineralblog · 4 months

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Orpiment & Calcite | Jiepaiyu Mine, Shimen, Shimen County, Changde, Hunan Province, China (Peoples Republic)

#Orpiment #Calcite #geology #crystals #minerals

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reddpenn · 2 months

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Do you have any neat calcites?

Do I ever!! Here are just a few of my favorites.

Here’s a specimen of huge brown barite crystals on a druzy of yellow calcite, from Elk Creek South Dakota.

Under a long wave UV light (365nm), the calcite fluoresces yellow, and the barite fluoresces pale blue.

The barite also has very strong yellow-green phosphorescence, meaning it glows in the dark for a while after the UV light is removed!

This is mangano calcite, a form of calcite that gets its faint pink color from manganese.

This specimen features lenticular crystals and a cool “pagoda” formation!

And of course, here it is showing off what mangano calcite is most famous for: its gorgeous orange-pink fluorescence.

Here is some classic optical calcite! Although it’s often called "Iceland Spar", this particular specimen is from Mexico.

Optical calcite is known for its birefringence, an optical effect in which it doubles the image behind it! This is because calcite’s crystal structure polarizes the light passing through it, splitting it into horizontal and vertical wavelengths. All calcite technically does this; we can just see it happening in optical calcite because it is very clear and easy to see through.

This beautiful, water-clear specimen of dogstooth calcite crystals is from Linwood Mine in Iowa. It features very distinct phantoms!

Phantoms form when a thin layer of some other mineral begins growing on the surface of the crystal. As the calcite continues to grow, that layer becomes trapped inside of the crystal, becoming a faint record of the crystal’s size and shape when it was much younger! Calcite phantoms are especially interesting because their image is distorted by birefringence.

This piece is a columnar calcite from Fujian Provence, China! Note the uncommon column shapes of the crystals.

It fluoresces a lovely orange red!

And of course my favorite calcite of all! This specimen is cobaltocalcite from Morocco. While that hot pink color looks totally dyed and fake, it’s actually completely natural! Cobaltocalcite gets its distinctive color from atoms of cobalt in its molecular structure.

There's more calcite in my collection, but these are the best, I think!

#rock collecting #red pen has cool rocks #look at my cool rocks #calcite

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dozydawn · 12 days

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birefringence & fluorescence from lasers through calcite

#one beam enters. two beams leave. said like a wrestling announcer #lasers #calcite #birefringence #fluorescence #geology #gems

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grimlock · 10 months

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created a quick reference sheet of calcite, just in time for artfight!! his design's changed so much since 2020 aaaaaa

#art tag #calcite #maccadams #artfight #transformers #transformers oc #mecha #mecha oc

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spaceguy44 · 5 months

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My fluorescent (glowing) rock and radioactive materials collection that I've been building for about a year with my partner. Looks cooler IRL than what my phone camera can do. I've labelled everything with the color they glow as the text color.