xUmp.com Logo

Back-To-School 2020 Science Supplies Sale
Back-To-School 2020 Science Supplies Sale
Quartz Crystal Cluster - Large Chunk (2-3 inch) - Image One
Share this product:

Quartz Crystal Cluster - Large Chunk (2-3 inch)

by xUmp.com   Item#: 15751  
List Price:$15.99
Sale Price: $8.99 /each
You Save: $7.00 (43%)
SOLD OUT Check back in 5 to 10 days to order this item.

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.

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.

Quartz Specifications:

  • Color: Colorless
  • Color of streak: White
  • Moh’s hardness: 7
  • Specific gravity: 2.65
  • Cleavage: None
  • Fracture: Conchoidal, Very Brittle
  • Crystal system: Hexagonal (trigonal); Prisms, mostly compact
  • Chemical composition: SiO2 Silicon Dioxide
  • Transparency: Transparent
  • Refractive index: 1.544-1.553
  • Double refraction: + 0.009
  • Dispersion: 0.013
  • Pleochroism: None
  • Absorption spectrum: Not usable
  • Fluorescence: None

 

 


Age:
14 +
Box Size:
3.00 x 3.00 x 3.00 inches
7.62cm x 7.62cm x 7.62cm
Weight:
0 lb 10 oz
0.28 kg

Customer Reviews


There are no customer reviews for this product. Be the first one to write one!

FEATURED PRODUCTS

Celestron 5MP LCD Digital Microscope II.

$299.99 $249

Celestron 5MP LCD Digital Microscope II

The LCD Digital Microscope II is a professional biological microscope at an affordable price. Up to 1600X with digital zoom!

Solar System Simulator.

$129.99 $124.99

Solar System Simulator

See the solar system in action!

MuscleWires Project Book and Sample Kit.

$32.99 $27

MuscleWires Project Book and Sample Kit

This project book and sample kit introduces you to shape-memory alloy technology!

Ultimate Chemistry Set CHEM C3000 v2.0.

$299.99 $229

Ultimate Chemistry Set CHEM C3000 v2.0

This superb chemistry set features 350 mind-boggling experiments!

Balancing Eagle.

$7.99 $4

Balancing Eagle

Defy gravity with this cool balancing eagle!

100 Rocks and Minerals of the U.S.A..

$99.99 $79.95

100 Rocks and Minerals of the U.S.A.

A massive mounted set of 100 rocks and minerals found in the US,

Science-Sidebar: Science Education Articles

xUmp.com Logo


Join our tribe:

SIGN-UP & SAVE

Sign-up for our weekly discounts and promotions email newsletter.



xUmp.com Catalog

CATALOG

View xUmp science supplies catalog

At xUmp.com, we are passionate about science. We believe in hands-on learning and making science fun. - Anton Skorucak, Physicist and Founder

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.