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.
Extra thick medical examination gloves - 60mil. Great for extra protection.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
Large nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Durable, anti-fog safety glasses that fit comfortably on any head size.
Extra-small nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
This microscope is so versatile you can even take it with you on a job site!
Build your very own smart robot!
This advanced physics kit is perfect for older children already versed in physics knowledge!
Ever wonder how to survive in the wilderness? These cards can help!
A touch of joy. A touch of science. Light responds to your touch and to the music in your room!
Learn Chemistry While Creating Sweet Treats
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.