Alex M. Peacock

A lovely crocoite thumbnail from the famous Adelaide Mine in Tasmania, Australia. #crocoite #australia #minerals #crystals #tasmanian #mineralspecimens

Tourmaline with a purple cap, from Água Branca, Brazil. #tourmaline #aguabranca #brazil #finegems #mineralspecimens

Rhodochrosite from the Sweet Home Mine in Park County, Colorado, from a find in the early 2000s. A classic cleaved crystal from a classic USA locale! #rhodochrosite #sweethomemine #colorado #crystals #usa #mineralspecimens

Fluorite from Big Cottonwood Canyon, Salt Lake Co., Utah. As far as I can tell, this is the only specimen to have ever come out of this specific locale. #rockhounding #utah #bigcottonwoodcanyon #fluorite #mineralspecimens

Rainbow lattice feldspar from the Hart Range in Australia. #crystals #rainbowlatticefeldspar #australia #mineralspecimens #crystalcollecting

Tourmaline with quartz from Pakistan. #tourmaline #quartz #elbaite #pakistan #mineralspecimens #crystals

Pyromorphite on matrix from Guangxi, China. #pyromorphite #mineralspecimens #china #guangxi #crystals

Sand calcite from Rattlesnake Butte, South Dakota. This is an old stock specimen, as collecting has been restricted due to the area being named a National Natural Landmark (NNL). #oldstock #crystalspecimens #calcite #sandcalcite #rattlesnakebutte #southdakota #usa

Tourmaline thumbnail crystal from Swat Valley, Pakistan. #tourmaline #crystals #pakistani #mineralspecimens

A hematite after ammonite pseudomorph from Morocco! This ammonite essentially died, became calcified, & was then subjected to a change in environment, that added iron and turned the calcite to hematite. #pseudomorph #fossils #hematite #ammonite #morocco

Beautiful old stock tourmaline from the Cruzeiro Mine in Minas Gerais, Brazil. #tourmaline #mineralspecimens #minasgerais #crystals

Smoky quartz from the Mineral Mountains, mined by a buddy of mine. #utah #mineralmountains #beaver #mineralspecimens

Secondary copper minerals (azurite & an unidentifiable one) with a brachiopod imprint . Collected from the Apex Mine in Southern Utah before it was closed off to the public. #apexmine #coppermine #southern #utah #mineralspecimens #fossils

Hematite pseudomorph after magnetite, from Malarque, Argentina #hematite #magnetite #pseudomorph #crystal #mineralspecimen

Tourmaline from the Chia Mine in Minas Gerais, Brazil. #elbaite #tourmaline #minasgerais #brazil #crystals #gems #mineralspecimens

Smoky quartz included with actinolite, from Namibia. #namibian #minerals #crystals #smokyquartz #actinolite #inclusions #mineralspecimens

Banded calcite from Utah Co., Utah. I shaped & polished this years ago using sandpaper & elbow grease (by hand) #calcite #utah #usa #rockhounding #mineralspecimens

Hollow elbaite tourmaline from the Pederneira Mine in Minas Gerais, Brazil. #pederneiramine #tourmaline #mineralspecimens

A unique clay included selenite crystal from Poland. I’ve always thought this looked like a key… maybe to a spaceship? #ibelieve #selenite #gypsum #poland #mineralspecimens

A clam fossil that formed pyrolusite and kerchenite crystals within. This specimen comes from the Kerch Peninsula in Ukraine, for which the latter mineral gets its name. #fossils #clam #fossil #pyrolusite #kerchenite #ukraine #mineralspecimens

“Kiwi” calcite on petrified wood from Garfield Co., UT. This specimen is from the original 1970s discovery, & has been on my bucket list for quite some time. I’m thrilled to finally have an example in my collection. #kiwicalcite #oldstock #crystals #garfield #utah #mineralspecimens

Amethyst from Elko Co., NV. The xls from this pocket are a very pale shade of lilac, with a brighter, more purple core. I collected this last year with my good friend on our last opportunity to rockhound together before he moved away, hence the name “Last Chance Pocket”. #amethyst #rockhound #nevada

So called beta quartz in matrix. Beta quartz forms at specific temperatures and pressures in the Earth that result in these perfectly symmetrical, hexagonal crystals. Despite this, they essentially paramorphs back into regular quartz. #quartz #betaquartz #crystals #mineralspecimens

Ethiopian opal rough. Lots of color play and minimal matrix. #opal #ethiopianopal #minerals #crystals

Topaz from Ouro Preto, Brazil. #brazil #minerals #imperialtopaz #gemstones

Botryoidal chalcedony collected near Wendover, Utah. #rockhounding #wendover #utah #chalcedony #botryoidal #minerals

A beautiful cluster of andradite garnets on matrix from the famous Stanley Butte locale in Graham County, Arizona. #andradite #garnets #stanleybutte #arizona #usa #crystals #mineralspecimen

Quartz on pyrite and galena from Peru. A really aesthetic thumbnail specimen. #peru #crystals #peruvian #pyrite #quartz #galena #mineralcollectors

Pyrrhotite with quartz from Dalnegorsk, Russia. #russia #dalnegorsk #mineralspecimens #crystals #pyrrhotite #quartz

Purple fluorite on calcite from Qinglong, China. #chinese #minerals #fluorite #calcite #yttrofluorite #crystals

Quartz from Big Cottonwood Canyon. I found this specimen years ago in a popular rockhounding locale that’s conveniently within a 20 minute drive from my home. #utah #quartz #crystals #rockhounding

A goethite after pyrite pseudomorph from Pelican Point in Utah County, Utah. The material from this world famous locale has been analyzed, and is confirmed to be goethite, rather than limonite. #utah #usa #crystals #minerals #goethite #pyrite #pseudomorph

Pyrite replaced brachiopod fossil from Sylvania, Ohio. #pyrite #brachiopod #pseudomorph #sylvania #ohio #usa #fossils #minerals #crystals

Old stock witherite from the Minerva Mine in Illinois. #usa #minerals #minervamine #illinois #witherite #crystals

Purple octahedral fluorite from Grant County, New Mexico. #fluorite #crystals #newmexico #minerals

Calcite on rosasite from the Ojuela Mine in Mexico. #calcite #aurichalcite #ojuelamine #crystals #minerals

Faden quartz from Pakistan. #quartz #fadenquartz #crystal #collection

Beautiful #tourmaline from Minas Gerais, Brazil. #crystals #gemstones #fineminerals #brazil

Calcite and austinite from the Ojuela Mine in Durango, Mexico. #crystals #minerals #calcite #austinite #ojuela

#Fluorite from Grand County, Utah