Some Rocks & Minerals May Be Ugly on the Outside but Beautiful on the Inside

t’s easy to pass by rocks and minerals while you are walking around but you never know what is lurking on the inside. Out in nature, the outside of most rocks and minerals look drab and dingy because of rain, wind, ice and snow that will wear away sharp points, dull the vibrant colors and cause cracks in the surface of the samples.

Carnelian is one mineral in particular which looks rather boring on the outside because of this weathering when you break it open to see a fresh surface, you can see vibrant orange colors and sometimes, a hidden surprise.

Ask-a-Geologist #19: What gives amethyst that pretty purple color?

Lily wrote to us and asked about the mineral amethyst. Specifically, she wants to know what gives amethyst that beautiful purple color. In this video, we talk about why amethyst is purple, its relation to quartz and an interesting fact about how citrine fits into that mineral family.

Crystals make great stocking stuffers!

We have a nice selection of specialty crystals for the avid collector. Choose from aragonite clusters, fluorite octahedrons, twinned staurolite, grossular garnet, gypsum roses, ulexite, iceland spar calcite, galena, quartz and herkimer diamond quartz.

Ask-a-Geologist Q&A: Sand Grains

Question: What is the name of sand grains cemented together?

Quartz Crystals are Still a Favorite with Children

Quartz is the most common mineral found in the Earth’s crust.

Quartz – lots of looks, one cool mineral

Quartz is the most common mineral found in the Earth’s crust.  Fairly hard, quartz is a 7 on the Mohs hardness scale which has a range from 1 (softest) to 10 (hardest).  Quartz, which is sometimes called “Rock Crystal,” is often colorless and has a glassy (shiny) appearance.  Quartz has a white streak when rubbed […]

Every heard of a Herkimer Diamond?

OK, today I thought I would talk a little about Herkimer Diamonds.  If you know what they are, you’ll probably agree with me that they are so cool! Sorry!  Herkimer Diamonds are not real diamonds.  Herkimer Diamonds are actually quartz crystals that are naturally formed with points on both ends of the crystal.  These crystals […]