Sedimentary Rocks

Sedimentary rocks are formed when sand, small pieces of rock, or mud are deposited as layers of sediment.

Staurolite Twins

Staurolite is a silicate mineral which occurs in metamorphic rocks and is often found with the minerals kyanite and garnet. Staurolite is a 7 to 7.5 on the Mohs Hardness Scale which has a range from 1 (softest) to 10 (hardest), has a glassy to resinous luster and a colorless streak. Prismatic crystals of staurolite are common and often found twinned.

Learn about Rocks made from Volcanoes!

Discover some of the Earth’s most magnificent rocks in this Igneous rock collection. Fifteen amazing samples will give you a sneak peek into both intrusive and extrusive rocks. Each rock comes with an identification card which includes a photo and fun rock facts. Try to identify each rock using the hand magnifier and information cards. If you need a hint, the name of each rock is beneath the foam padding.

The neatest rocks you probably don’t know much about

I love metamorphic rocks. To think that each of these rocks once was a different rock and just because of some really high heat and squeezing, they became something new is really cool! Here are some details on our My Rockin’ Collection Metamorphic Rocks kit. I think you’ll agree that these rocks are cool.

Conglomerate Sedimentary Rock Q&A

Here is another great question we received through our Ask-a-Geologist email. Question: What grains are in conglomerate rocks?

Today we are Sedimentary Sleuthing!

Teach your children about sedimentary rocks with this cool Sedimentary Sleuthing kit. Your kit comes complete with six cool sedimentary rock samples: lignite coal, sedimentary breccia, conglomerate, fossiliferous limestone, yellow sandstone and shale.

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Shop for rock kits for kids, My Rockin’ Collection dexlue kits, our new Rock Detectives Mineral Mission kit, individual rocks, minerals, streak plates and hand magnifiers.  Shopping for your classroom?  All of our School Edition kits are ready for you!  Shop now at www.MiniMeGeology.com!

Metamorphic Q&A

Ask-a-Geologist Q&A about Metamorphic Rocks. What rocks are changed by high pressure and high temperature?

New Shipment of Grossular Garnet has arrived!

A new shipment of wonderful grossular garnet crystals have arrived. Beautiful grossular garnet mineral from Mexico is one of six varieties of garnet. Each single crystal shows the natural dodecahedral form of the garnet group. These samples, from Mexico, are approximately 0.75 to 1 inch in size.

Obsidian……Can you use it?

Here is another Ask-a-Geologist that we received. Obsidian is one of our favorite rocks. Children love this rock too! Question: What is obsidian rock used for?