Erika Anderson

Orbicular granite

Fossil of Megarachne showing its body in a flat piece of rock. At the bottom corner is part of a white paper label with a red symbol of a circle with a line through it over the outline of a spider. At the Sedgwick Museum.

This Megarachne may not actually be a spider, but my spidey senses are still pretty scared of it. #FossilFriday⚒️🧪

Been looking for her and her husband’s mineral collection, if anyone has any info. #GeoscienceBluesky ⚒️🧪

Fossil skull of Edmontosaurus regalis mounted on a red plinth behind glass. There are edges of specimens and labels around it. At the Royal Ontario Museum.

This is a skull of one of the biggest duck-billed dinosaur species, Edmontosaurus regalis. #FossilFriday⚒️🧪🦖

Spinel

Correct!

The answer to this Guess the Gem is spinel!! This one was part of the Treasury of Saint-Denis in France. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎

Kīlauea is erupting! 🌋 Here’s a link to one of the three @USGS live cams - enjoy! www.youtube.com/live/tk0tfYD...

A pink oval cabochons mounted on a metal rod on a grey shelf with a grey background. There are some fractures in it. At the Muséum national d’Histoire naturelle.

Guess the Gem time!! What mineral do you think this gem is? Hint: in the past gems of this mineral were called rubies, though now the term refers to corundum. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎

Bright orange crystal octahedra of scheelite in white crystals. It sits on a black background. Edges of a plexiglass label and white specimen can be seen to the upper right. At the Sorbonne.

Great little crystal of bright orange scheelite. It would be surprisingly heavy if you held it due to the tungsten in this mineral. #MineralMonday #GeoscienceBluesky ⚒️🧪

It's Friday, and apparently bluesky is ready for this fun revelation:

Dinosaurs lived on the other side the Galaxy.

Want to visit Siccar Point but can’t get out or it’s too far away?

@callanbentley.bsky.social has made this amazing online field-guide, including gigapan images and some fantastic virtual outcrops that you can explore in 3D. Check it out!

opengeology.org/historicalge...

The skull of the giant sloth, Megatherium americanum, mounted on a metal rod on a wood plinth. Wood plinths with other specimens can be seen behind it. A white label sits to the lower left. At the Muséum national d’Histoire naturelle.

The skull of a giant sloth, Megatherium americanum, from South America. This species went extinct, along with most other megafauna, in the Late Pleistocene Extinction Event thought to be caused by humans and changes in the climate. #FossilFriday

Yes it’s topaz

Correct

Topaz

Yes

💯

Correct

Topaz

The answer is topaz!! It’s a mineral that can be a few different colours. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎

Two gems on a beige background. The top is a large round light brown Portuguese-style cut gem. The bottom is a small bright blue oval cute gem. The edges of white labels can be seen at the top and bottom. At the Natural History Museum in London.

Guess the Gem!! What mineral do you think these two gems are? Hint: the blue one is irradiated and heated to get that colour.
#GuessTheGem #GeoscienceBluesky ⚒️🧪💎

Specimen of pachnolite showing bright brown yellow sharp crystals in a cavity in white crystals. It sits on a frosted plinth on a glass shelf on a grey wall. The edge of a green and brown specimen on a plinth can be seen to the top left. The plinth has a label that says « Pachnolite/Pachnolite » on it.At the Royal Ontario Museum.

Have you ever heard of this mineral? Pachnolite was discovered in Greenland and the name translates to frost stone, which is a very cool name. #MineralMonday #GeoscienceBluesky ⚒️🧪

Brown crystals forming a cross in white matrix. It sits on a black background. At the Sorbonne.

The metamorphic mineral staurolite with its distinctive penetration twinning forming a cross. It’s positively delightful!! #MineralMonday #GeoscienceBluesky ⚒️🧪

Looking down the jaw of mounted skeleton of a fossil sabre-toothed tiger with its mouth open. It stands on a wooden plinth on a wood floor among glass display cases. At the Muséum national d’Histoire naturelle.

As cool and cute as sabre-toothed tigers are, at least I don’t have to fear staring down the maw of Smilodon populator these days. #FossilFriday ⚒️🧪

Oh my gosh. These are both super cool. Ilmenite is amazing, and I love titanium...but I think I'm gonna vote for the super unusual #Jadarite, which is a lithium borate.

We're Team #Ilmenite today in the #OreCup! Not only did it enable Bob Ross's happy little clouds, it also may have helped flip the Moon's mantle. So versatile! 🔭🧪🌕

eos.org/articles/the...

Specimen that is a polished slab of white and pale and dark brownish pink stripes , resembling bacon. It sits on a grey background with the edges of another specimens and labels seen around it. Label to the bottom right says « D28 - BM.58818 Stalagmitic banded, polished Loket, Karlovarský kraj. Czech Republic » At the Natural History Museum London.

Ah yes!! Another bacon specimen!! This time it’s banded aragonite. #MineralMonday #GeoscienceBluesky ⚒️🧪

It’s hematite

Yes it’s hematite