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Up for sale is a lot of 4 pieces of tektite - with an approximate total weight of 100 grams. The tektites pictured are not the actual ones you will receive, but are an example of what you will receive if you purchase this item. There are about 7-10 different shapes of tektites but the usual shapes are round like a disc, teardrop. or ovoid. The surface may be smooth or rough. The tektite was found in the Guangdong Province, China.
These rocks have a high silica content and are also rich in oxides of potassium, calcium, and aluminum. It is believed that Tektite is formed when a meteorite impact melts material from the Earth's surface and catapults it up to several hundred kilometers away from the impact site. The molten material cools and solidifies to glass.