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.
Save with this large package of 300 medium-size nitrile exam gloves!
These disposable face shields are popular with health professionals, dentists, EMTs, etc. They act as a full-face barrier protection against body fluids.
This is a smart value 200 gloves box of Large Nitrile exam gloves.
Great exam quality Nitrile gloves in size SMALL.
Affordable pack of 10 PPE face shields for protection from liquids.
Great premium general purpose KingSeal Nitrile gloves in size SMALL. Not for medical use.
This microscope is so versatile you can even take it with you on a job site!
The Wimshurst Machine is a high quality static machine for student labs.
This caffeine molecule mug makes an excellent gift!
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
Buy Newton's Cradle or balance balls here! This classic science desk toy that will keep you amused and teach you physics.
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
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