Easy-to-implement Activity Supplies for Camps & Schools. Fossil, mineral and replica exhibit pieces. Great for Nature & Science camp programming & PTA Family Fun Nites or fund-raisers! Check out our other product categories for additional items! Call 800-411-3466 for volume discounts.
Geodes - 5 Break Your Own - Crystal-filled - 2"-4" wide!
$29.99
Spectacular, diamond-like quartz crystals inside. From Morocco - easy to break, unlike typical domestic geodes. Approx size 2"-4" each. Set of 5 - some of the best on the market today Great party activity, party favor or classroom science activity. Kids and adults alike love this activity as they can break open a genuine geode (volcanic rock) which has beautiful crystals inside. Simply use a household hammer and lightly tap the geodes off-center, until they split. Great dinosaur party activity or crystal mining party activity. One of our favorite science teacher supplies. Size varies - approximate size is 2"-4" in diameter. These come from Morocco are are absolutely brilliant inside.
ID Chart - MOHS Hardness Scale - Rock and Mineral Collection
$19.99
Great earth science resource - Chart with samples on the Mohs Hardness Scale
Includes numbers 1-9 (all except diamond)
Specific samples included are Talc, Gypsum, Calcite, Fluorite, Apatite, Feldspar, Quartz, Topaz, Corundum
Wonderful for Science Fair presentations on Rocks, Minerals or Geology
The chart measures 8 1/2" x 5 1/4" with samples affixed to a sturdy card with ziplock protective plastic covering
Includes 9 genuine rocks/minerals/gemstones that are one through nine on the Mohs Hardness Scale. The Moh's scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.
