What is the method of how to open them? Do you need to have a separate tool for that?

The best way to open them is to take a large file & carefully cut a groove around the Geode along any depressions in the shape. Place in on a towel on a concrete floor. Be sure to put on safety glasses! Take a large chisel and place it in the groove. Strike the end of the chisel with a hammer to break the Geode open. Be careful everyone standing near has their safety gasses on as well!

Can use a sharp,big knife or if not, what do you use

Please do not even consider attempting this with a knife. That is an E.R. trip in the making. We were quite successful with a hammer and wide chisel.

Does the item include a hammer?

If you don't already have a hammer, this item is not for you.

They are real just not real impressive. You're better off to buy bigger geodes online. The kit has nothing spectacular you need. My package was full of solid rocks. Took a 5 lb sledge to get the apart. 100% waste of money.

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Discover a crystal treasure trove with the Geographic Earth Science Kit With five extra large crystal-filled geodes to open, kids can explore these breathtaking rocks with lots of hands-on fun Geology is no more exciting than breaking open rocks and finding stunning crystals inside The five jumbo geodes in this kit are about the size of a tennis ball (8 to 3. 9 in) and are ready to open to see the amazing natural beauty inside. This earth science kit provides a hands-on science experience that you and your kids will love. This science kit includes: 5 jumbo geodes filled with high quality crystal, 1 set of safety glasses, 3 display stands, 1 color learning guide. Cracking open geodes is the perfect activity for energetic boys and girls The included displays are perfect for showcasing the crystals they find, while the full-color learning guide teaches many amazing geode facts. Order the Geographic Earth Science Kit today and see how fun geology can be. National Geographic Toys manufactures practical science toys of the highest quality, and all products enjoy exceptional service. With a mission to inspire people to care about the planet, the National Geographic Society is one of the largest non-profit science and educational organizations in the world.

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E£ 20875

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Educational Objective(s)	Earth Sciences
Language:	English
Model Number	NGGEOJUM5
Number of Game Players	1
Assembly Required	No
Batteries Required	No
Batteries Included	No
Material Type(s)	Glass
Remote Control Included?	No
Product Dimensions	31 x 28 x 9.8 cm; 2.81 kg
Item model number	NGGEOJUM5
Manufacturer	JMW Sales, Inc.
Country of Origin	USA
Item Weight	2 kg 810 g

NATIONAL GEOGRAPHIC Open 5 Giant Geodes - Earth Science Kit with 5 Premium Extra-Large Geodes with Crystals, Glasses, Learning Guide and Display, STEM

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