This large chunk of a Quartz Crystal Point, 1-2 inches in diameter, is great for any mineral collection.
FOUND IN: BRAZIL, INDIA, MADAGASCAR, MOZAMBIQUE, NAMIBIA, SRI LANKA & USA
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.
Professional Powder-Free Textured Nitrile Exam Gloves with Aloe, Size Large
Great premium general purpose KingSeal Nitrile gloves in size SMALL. Not for medical use.
These disposable surgical-style earloop face masks conform to the ASTM F1862 Level 1 clasification. Box of 50.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Box of 100 X-LARGE nitrile exam gloves.
High-protection, fluid-resistant and anti-static disposable lab coat in size Extra Large.
Build a magnetic levitating train with this science fair project kit!
View the glory of space with this hi-tech telescope set!
This high precision gyroscope will amaze you with rotational speed and ease of precision.
Build a hand that realistically moves its fingers using shape memory allow technology!
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.
Build your own windmill generator kit by recycling a plastic bottle!
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