Now that I'm back from the gem and mineral show, here are all the Cool Rocks I came home with!
A cute little coral fossil! He looks like a cauliflower.
A Keokuk geode! These geode beds aren't far from where I live, and it's always fun to have local specimens.
Phosphosiderite! This purple stone comes from Chile. It's so soft that it has to be stabilized with resin before it's cut. This one is a cross section of a botryoidial formation!
Speaking of botryoidial, this Hematite! Botryoidial means it has a bubbly shape kind of like a bunch of grapes. The faces of the bubbles on this pieces are super shiny and metallic.
Dendritic chalcedony, from Turkey! It's a white chalcedony full of dendrites - branching formations of manganese that look kind of like trees!
A cabochon for my cab collection! This one is made from a material sometimes called "ajooba jasper." The pattern is actually a cross section of a bunch of colorfully jasperized bivalve fossils!
Speaking of jasper, this one is Blue Mountain jasper, from Oregon! The circles in this stone are whatβs known as an βegg pattern,β and jaspers which have them (Blue Mountain, Imperial jasper, and a few others) are collectively known as βfine jaspers,β the most valuable jaspers in the world.
Hyalite opal! This stuff forms water-clear spheres that look like jelly.
It fluoresces bright green under UV light!
Now to show off this year's haul of awesome agates!
Dryhead agate, from the Bighorn Mountains in Montana! This agate is named after the many bison skulls found in the area. A weird shaped guy with awesome red and orange bands.
Bou Lili agate, from Morocco! I like the name of this one. Soft banding and very subtle, muted colors. I've heard that this locale can produce peachy colors too.
Bear Canyon agate, from the Pryor Mountains in Montana! Agates from this locale have very stark black and white banding.
Red Fox agate, from Argentina! Sometimes this material is also called "crater agate" because the area it comes from is near the crater of an ancient volcano.
A Blue Sky thunderegg, from New Mexico! Thundereggs from this locale often have this two pointed, saucer-like shape.
It fluoresces really brightly!
Dulcote agate, from England! The bands of this agate are full of calcite, which gives them a strange, distinct texture.
Malawi agate, from Malawi! See all the cracks in it? Almost all Malawi agates have them. Frequent earthquakes due to the East African Rift cause these agates to crack and fracture.
Paint Rock agate, from Paint Rock Valley in Alabama! This agate is very rarely banded, and usually just contains swirls of red and yellow color.
A big, unpolished slab of Montana agate! This agate is known for its clear banding and black lines and spots, which are caused by manganese dendrites.
It's best viewed with some light behind it!
A smaller piece with really amazing dendrites!
Fighting Blood agate, from Hebei Provence in China! This locale is known for its super saturated reds and yellows. This piece has purple amethyst crystals growing inside! They didn't photograph well; they are much more purple in person.
A really weird Fighting Blood agate! This one lacks the bright colors typical of this locale, but makes up for it with that super cool spiderweb pattern!
And finally, as is tradition, I came home with some Ethiopian opals! Here are the five I got this year.
And that's everything I got at the show!
jacobvanloon
jbbartram-illu
yousharknotpass
prguitarman
dailybridgerton
gummygunk
