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.
These large, powder-free, 5mil Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
These premium 5mil medical-grade Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
Save with this large package of 300 medium-size nitrile exam gloves!
Great premium general purpose KingSeal Nitrile gloves in size SMALL. Not for medical use.
This set includes four (4) N95 NIOSH approved respirators.
High-protection, fluid-resistant and anti-static disposable lab coat in size Large.
Create beautiful art with this amazing sun paper!
Explore the wonders of wind power with this amazing kit!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
This caffeine molecule mug makes an excellent gift!
The Wimshurst Machine is a high quality static machine for student labs.
This is a great clean heat demonstration model for the classroom setting!
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