Obsidian is a rock which is a type of naturally occurring glass produced by volcanoes. It lacks crystal structure, which can make it have extremely thin edges. This is the reason why obsidian was often used as arrowheads in a variety of ancient cultures. You can have your very own arrowhead to show to your friends! A great collectible item for the Native American art collector!
Please be aware that this is a natural mineral and as such each piece is one of a kind! The one you receive may not be exactly the same as the ones pictured but it will be similar. Price is per each piece. They come in irregular shapes, sizes and weights.
This kit includes several different projects that demonstrate the power of magnets!
An ancient toy featuring optical illusion and hands-on fun that never grows old!
Build over 100 exciting electronic projects with this easy to use kit!
See the constellations visible in the Northern Hemisphere on this watch!
View the glory of space with this hi-tech telescope set!
This project book and sample kit introduces you to shape-memory alloy technology!
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