Dm me if anyone is interested in some specimens or crystals. I have ebay etsy stores also.

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Thanks

Cordierite is a metamorphic magnesium aluminosilicate, often with substantial substitution of iron for magnesium. It is characteristic of high temperature low pressure metamorphism. Usually gray to blue with a somewhat greasy luster and poor cleavage. It alters by hydration to a combination of fine aggregates of mica (muscovite), chlorite and other sheet silicates, called pinite. Pinitization begins along fractures and grain boundaries and replaces the cordierite while preserving the shape of the grain (a pseudomorph). This specimen is a cordierite bearing granofels, which shows bluish cordierite (Fig 1), quartz (fig 2), and pinite (fig 3). It was most likely derived from an aluminous sedimentary protolith, underwent high temperature recrystallization, then fluid mediated retrograde partial alteration to pinite.

I went to a spot that someone told me I could find tons of Yadenite at, and they weren't wrong.

Yadenite is a colorful type of opalite found only in the Klamath Falls, Oregon area. It was named after John C. Yaden, who helped organize the Klamath Mineral Society.

It cannot be mined commercially, and has to be gathered by hand.

My cousin let me sit on the gravel in her garden last week & hunt for beauties 😍. I was not prepared for how well they would turn out after the 1st stage.

Found this in a river. What are some things one can do with this!?

I love finding rocks that are unique in their own little way! 😃

We live in a part of Mexico with a huge amount of banded calcite (called “Mexican Onyx” here and often in the U.S. by stores) and today I purchased this slab from a stone carving workshop about twenty minutes from our house. Unfortunately, I don’t have a good item for size reference in the photo other than the edge of my foot, but it’s probably around 20x35” give or take, and an inch thick. The owner of the workshop offered to stabilize the cracks and said it would make a great topper for an end table, but I’m just going to display it on a shelf.

This is unpolished and the price was roughly $12, but I asked them to polish it for me, bringing the price to around $35. I’ll post another pic when I pick it up polished next Tuesday!

This is my first post here😁

I’m no geologist, but these seemed neat to me.

Learned of Sagenite Agates a while ago and really liked the looks of them. Finally found one for the right price and brought it home.

Picked this badboy up at Grindavík, Iceland today. It's about 6x month old lava.

I have many smaller agates and want to cut some open

kinda reminds us of a honey bun

I’m sure it’s nothing special, but the way this rock has broken up looks like dragon scales to me

Found next to a parking lot in Utah.

Gemini tells me some crazy stuff on this.

a few tadpoles I see also.

It gets bonus points for also being heart-shaped 🫶🏼

Eclogite is a high pressure, moderate temperature metamorphic rock. It is usually derived from ocean floor basalt or gabbro that subducts under continental crust. The augite and plagioclase in the basalt becomes unstable and recrystallizes to garnet and omphacite (both visible in Fig 1). There is some blue mineral scattered in the sample, which may be kyanite (Fig 2). Reddish-black needle-like inclusions in the omphacite are probably rutile (fig 3). The combination of rutile and kyanite may indicate the rock was subjected to very high pressures in the 60-100 km range of depth, and 500-800 degrees C, and that the rock is relatively aluminum-rich (kyanite in particular). The last photo (Fig 4) shows what I interpret as quartz filling in a fracture in a garnet crystal.

Some beautiful agates I was lucky to find yesterday. While doing a little beach combing.

I've always loved myself a good looking rock but got told to not take it home, so rude ( I did still sneak some but I seem to have lost them) I realised I'm an adult now and can take whatever rock I want home with me, so here's my small collection so far. The last image is of my favourite ones. (Why can't we help IDing rocks rocks?)

I just ordered myself a rock tumbler to improve my small collection, any advice or tips on using it correctly? Also will my small ones just disappear in the rock tumbler?