This large chunk of Quartz Crystal Cluster, 2-3 inches in diameter, is great for any mineral collection.
The purest Quartz is the colorless form known as Rock Crystal. Made up of prisms which can grow to enormous sizes, a crystal cluster has many points emerging from the base. They can be small or very large and each one is unique.
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Quartz Crystal (Colorless, aka Clear Quartz, Rock Quartz, Rock Crystal, Crystal Quartz): The transparent colorless variety of Quartz is still known as rock crystal. Long ago, people believed that rock crystal was a compact form of ice: crystallos actually means “frozen.” The best rock crystal has the clarity and shimmer of crystal clear water. Although colorless Quartz is relatively common, large flawless specimens are not. Which is why most crystal balls these days are made of glass, not Quartz.
There are two main varieties of quartz, though they share the same chemical composition, silicon dioxide. Macrocrystalline quartz, includes stones like amethyst, aventurine, rock crystal, blue quartz, citrine, hawk’s eye, prasiolite, quartz cat’s eye, smoky quartz, rose quartz and tiger’s eye. The quartz is mostly transparent to translucent. Cryptocrystalline quartz, with microscopically small crystals, is known as chalcedony, and includes agate, chrysoprase, bloodstone, jasper and carnelian. Crytocrystalline quartz is usually opaque or translucent.
Extra-small nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
These goggles meet the American National Standards Institution (ANSI Z87.1) and Canadian Standards (CSA Z94.3) regulations.
Durable, anti-fog safety glasses that fit comfortably on any head size.
Large nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
Learn how solar cells transform light into electrical energy with this great kit!
This kit includes several different projects that demonstrate the power of magnets!
This magic bird defies gravity before your very eyes!
Use this cool Sea Monkeys zooquarium to teach your child how to take care of a pet!
This mirascope creates a 3D hologram image!
Learn Chemistry While Creating Sweet Treats
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