List of Rocks

February 2025 - Calcite
FORMULA: CaCO3 MOHS HARDNESS: 3 Calcite is a super common mineral, but there’s more to this crystal than meets the eye. Look through it and you’ll see what we mean....
February 2025 - Calcite
FORMULA: CaCO3 MOHS HARDNESS: 3 Calcite is a super common mineral, but there’s more to this crystal than meets the eye. Look through it and you’ll see what we mean....

January 2025 - Adamite on Limonite
FORMULA: Zn2AsO4OH LOCATION: Ojuela Mine, Durango, Mexico Safety & Handling Warning: Adamite, January’s Rocks Box mineral, has the non-ideal combination of containing the element arsenic and being somewhat crumbly. This combination...
January 2025 - Adamite on Limonite
FORMULA: Zn2AsO4OH LOCATION: Ojuela Mine, Durango, Mexico Safety & Handling Warning: Adamite, January’s Rocks Box mineral, has the non-ideal combination of containing the element arsenic and being somewhat crumbly. This combination...

December 2024 - Fluorite
Chemical Formula: CaF2 Mohs Hardness Scale: 4 Fluorite crystals are pretty simple, chemically speaking. They’re just fluoride and calcium, which naturally make a colorless crystal. But when impurities get into...
December 2024 - Fluorite
Chemical Formula: CaF2 Mohs Hardness Scale: 4 Fluorite crystals are pretty simple, chemically speaking. They’re just fluoride and calcium, which naturally make a colorless crystal. But when impurities get into...

September 2024 - Azurite
Formula: Cu3(CO3)2(OH)2 Mohs: 3.5 - 4 This stunning blue mineral has been used as a pigment for centuries—and no, it isn’t lapis lazuli. Azurite is a beautiful, deep blue crystal...
September 2024 - Azurite
Formula: Cu3(CO3)2(OH)2 Mohs: 3.5 - 4 This stunning blue mineral has been used as a pigment for centuries—and no, it isn’t lapis lazuli. Azurite is a beautiful, deep blue crystal...

November 2024 - New Jersey Amber
Locality: Sayreville, New JerseyMohs Hardness Scale: 2.5 Amber, AKA fossilized tree resin, is not just beautiful, but also really great for science. Despite the name, amber doesn't have to be,...
November 2024 - New Jersey Amber
Locality: Sayreville, New JerseyMohs Hardness Scale: 2.5 Amber, AKA fossilized tree resin, is not just beautiful, but also really great for science. Despite the name, amber doesn't have to be,...

October 2024 - Elrathai Trilobites
Species: Elrathia kingiiAge: 498 to 513 Million years old Trilobites are some of the most iconic and collectible fossils out there. Even though they look like pillbugs, they’re more closely...
October 2024 - Elrathai Trilobites
Species: Elrathia kingiiAge: 498 to 513 Million years old Trilobites are some of the most iconic and collectible fossils out there. Even though they look like pillbugs, they’re more closely...