Quartz is the most common mineral on Earth. It has a hard glassy surface and occurs in many shapes and colors. Clear quartz is found in masses, in clusters or aspoints, which are pieces of clusters. Quartz generates an electrical charge and has many scientific, industrial and metaphysical uses. Quartz can manifest in a huge variety of different forms, each with its own color. This particular specimen is an example of smoky quartz, which is a is a grey, translucent variety of quartz. It ranges in clarity from almost complete transparency to a brownish-gray crystal that is practically opaque. Some can also be black. Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon, formed from the silicon dioxide by natural irradiation. This beautiful example of smoky quartz is a must for comprehensive personal rock and mineral collections or for the classroom, and constitutes a unique decoration for the home or office.
Please be aware that this is a natural mineral and as such each piece is one of a kind! The one you receive may not be exactly the same as the ones pictured but it will be similar. Price is per each piece. They come in irregular shapes, sizes and weights.
This is a great clean heat demonstration model for the classroom setting!
Discover how solar cells make electricity with this awesome kit!
This magic bird defies gravity before your very eyes!
Comprehensive collection of 30 fossils.
This simple but amusing magnetic toy will keep you busy for hours!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.