Chemistry:Rizalite
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Rizalites are black stones of meteoritic origin found in the Philippines . They are considered to be some 710,000 years old.[1] As such, they are considered tektites - bodies composed of black or dark brown natural glass formed from terrestrial debris ejected during extraterrestrial, meteorite impacts. They generally range in size from millimeters to centimeters.[2]
The stones were named by the Philippine national hero José Rizal.
References
- ↑ http://www.nationalmuseum.gov.ph/nationalmuseumbeta/Collections/Geology/Tektites.html Rizalites on National Museum of the Philippines
- ↑ http://www.tektitesource.com/Bikolites.html
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