Biotite has arrived!

We are excited to offer the mineral biotite on our website now. Biotite is a common mica mineral that is black to brownish-black in color.

Sulfur has arrived!

Sulfur is a bright yellow to yellowish-brown, soft mineral being only a 1.5 to 2.5 on the Mohs hardness scale.

Do you know Amethyst?

Amethyst is the purple form of the mineral quartz. Fairly hard, amethyst is a 7 on the Mohs hardness scale. Amethyst is always purple and has a shiny appearance.


It is Mineral Week here at Mini Me Geology so we are starting out with one of my personal favorites. DIAMONDS!

February Babies, Amethyst is your stone!

February babies are lucky! Amethyst is one of the coolest minerals ever. We love the variations in the purple color and the awesome points that it can form. Amethyst is actually a purple form of the mineral quartz.

The Coolest Stocking Stuffer EVER! Ulexite Mineral

This unique mineral is often called TV Stone or TV Rock because of its fiber optic properties. Place a sample on a picture or text and watch the image transmit from beneath the mineral to the top. Ulexite is composed is white, silky fibers and is very soft.

Azurite Mineral – A great mineral for your rock kit

Azurite is a beautiful, deep blue colored mineral. Relatively soft, azurite has a hardness of 3.5 to 4 on the Mohs scale. The deep blue color in its natural form and its light blue colored streak are strong identifying properties of the mineral.

Today’s Ask-a-Geologist Question – Is being a Geologist fun?

We received this interesting question from a 10-year old who is interested in what is it like to work as a geologist.

Question: Is being a geologist fun? Or is it drudgery? Do you have to stay away from your family for long periods of time?

Metamorphic Q&A

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

How to Perform a Mineral Streak Test

A streak test is one tool that geologists use to determine the identity of a mineral. The “streak” is the color of the mineral in powdered form. Some minerals will have a streak color that is the same as the outer color of the mineral while others will have a streak color that is very different from the outer color.