CatWithRocks

#MineralMonday

Here is a big dark green Tourmaline (var. Elbaite) crystal from Brazil. The variety of green colored Elbaite is known is Verdelite. Would you believe I bought this specimen for $33 at an auction? This is at least a $300 specimen.

Green duftite grown in and on white calcite crystals

For this #MineralMonday , a nice and strange light green Duftite grown in an on Calcite...

From Tsumeb !

#MineralMonday Tiny silver crystals in a cavity in native copper, Osceola Mine, Michigan USA. The silver crystals are about 0.5 mm each.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience

I also need to go to the Smithsonian :(

I have yet to actually make it to Tucson for the Rock, Mineral, and Gem show, but I would love to see the goodies y'all picked up if you did get the chance to go!

After careful consideration, I must go with clay. Not only for its use in ceramic, but clay minerals are also just silly little guys.

You are welcome here!

Welcome to the dark side. We have cool rocks :3

I can confirm it does have a garlic smell to it!

I would not wear it, but it would be cool to have a cut or faceted Arsenopyrite gem.

Indeed!

An alternate view of today's specimen showing a wider range. Several dark metallic crystals of Arsenopyrite can be seen with thin metallic needles of Zinkenite on the clear Calcite matrix.

An alternate view of today's specimen showing a wider range with digitally added lines to differentiate minerals. Several dark metallic crystals of Arsenopyrite (circled in red) can be seen with thin metallic needles of Zinkenite (circled in blue) on the clear Calcite matrix.

This specimen in particular also has a mineral known as Zinkenite which forms these metallic, acicular crystals.
I've circled the Arsenopyrite in red and the Zinkenite in blue.

Photograph of a mineral specimen taken with a microscope. The image is focused on a dark metallic, tabular crystal of Arsenopyrite on a matrix of clear and white calcite. This specimen is from Sussex County, New Jersey, USA.

This #MineralMonday I got a lovely little crystal of Arsenopyrite from New Jersey! It has got such an interesting crystal habit in my opinion!

Everyone needs an emotional support rock... or a few hundred

Beautiful stone you got there!

This specimen actually does not have any azurite present!

You got such a spectacular piece there! I love the velvety look the fibrous growth has!

Thank you for the suggestion!

It has a prismatic crystal habit. Sharp and clean crystals!

#MineralMonday blue fluorite, inclusions of boulangerite, or jamesonite, or stibnite needles, Yaogangxian Mine, Hunan, China. 50 mm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience

Mineral specimen of rich, crystalline Malachite with a green-blue color on the face of a light grey rock.

I have used this image as my banner, but never showed it off properly. So for this #MineralMonday, I proudly present this spectacular specimen of Malachite!

I'm being a furry and a geologist... couldn't be me...

I'm excited to see what you do with it!

Once you go birb, you cannot go back

A microscope photos of a mineral specimen. The orange transparent prismatic crystals are Montgomeryite and the fuzzy white spheres with small acicular crystals are Englishite. This specimen is from Custer County, South Dakota.

Today is going to be a micro #MineralMonday! I have some stunning orange Montgomeryite crystals on fuzzy white balls of Englishite!

Awesome doodles!

Three white clusters of scolecite that are composed of thin crystal bunches that taper to a point. One is vertical and the other two are atan angle to it, one attached at the top of the vertical crystal and one in the middle, forming a point on its left. It is on a frosted plinth in front of a grey background.

First Mineral Monday of the new year!! I love the natural artistry of this scolecite (a mineral in the zeolite group). The careful balance of the three crystal clusters is gorgeous!! #MineralMonday #GeoscienceBluesky ⚒️🧪

A mineral specimen of several long, dark brown Staurolite crystals in a white matrix. Some of the Staurolite crystals exhibit penetration twinning at 60 degree angle.

Psst... Hey...
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!

I feel called out!

I understand your struggle. I'd would love to get to know you better honestly!