The pictures in the listing are just for reference as we are selling multiple lots with same Your best online business partner
Black Indochinite Tektite Stone 15 g - 50 gram Size Pcs 80 gram Lot
Small Medium Size BlackIndochinite Tektite Stone from China
Weight: 80 gram lot (0.18 pound) - (about 2 to 4 pieces in each lot)
Each piece from 15 to 50 gram
Size: 16x28x33 mm to 23x38x45 mm
Location: Sourced at Zhanjiang city, Guangdong Province, S. China
The pictures in the listing are just for reference as we are selling multiple lots with same pictures.
***
Tektite
Tektitesare gravel-size bodies that are composed of black, green, brown or gray, natural glass that are formed from terrestrial debris ejected during extraterrestrial impacts. They are characterized by 1. a fairly homogeneous composition; 2. an extremely low content of water and other volatiles; 3. an abundant lechatelierite; 4. a general lack of microscopic crystals known as microlites and chemical relation to the local bedrock or local sediments; and 5. their distribution within geographically extensive strewnfields. Tektites generally range in size from centimeters to millimeters. Millimeters-size tektites are known as microtektites.
Although tektites are superficially similar to some terrestrial volcanic glasses (obsidians), they have unusual distinctive physical characteristics that distinguish them from such glasses. First, they are completely glassy and lack any microlites or phenocrysts unlike terrestrial volcanic glasses. Second, although high in silica (>65 wt%), the bulk chemical and isotopic composition of tektites is closer to those of shales and similar sedimentary rocks and quite different from the bulk chemical and isotopic composition of terrestrial volcanic glasses. Third, tektites contain virtually no water (<0.02 wt%) unlike terrestrial volcanic glasses. Fourth, the flow-banding within tektites often contains particles and bands of lechatelierite, which are not found in terrestrial volcanic glasses. Finally, a few tektites contain partly melted inclusions of shocked and unshocked mineral grains, i.e. quartz, apatite, and zircon, as well as coesite.
The difference in water content can be used to distinguish tektites from terrestrial volcanic glasses. When heated to their melting point, terrestrial volcanic glasses will turn into a foamy glass because of their content of water and other volatiles. Unlike terrestrial volcanic glass, a tektite will produce only a few bubbles at most when heated to its melting point because of its much lower water and other volatiles content.
Item SpecificsModified Item NoCountry/Region of Manufacture China
Payment Payment: By Paypal
Shipping cost Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Return policy Returns: We accept returns with any reason in 30 days. Buyer will bear the return shipping cost.
Messages We will answer messages in 24 hours during working days.
[ Policy: This is the contents of your policies.You can add a banner for this policy as header and add text descriptions here. The text descriptions can be different Font Size, Font Color, Style and even graphics and icons are also accepted. ]
Your best online business partner
Black Indochinite Tektite Stone 15 g - 50 gram Size Pcs 80 gram Lot
Small Medium Size BlackIndochinite Tektite Stone from China
Weight: 80 gram lot (0.18 pound) - (about 2 to 4 pieces in each lot)
Each piece from 15 to 50 gram
Size: 16x28x33 mm to 23x38x45 mm
Location: Sourced at Zhanjiang city, Guangdong Province, S. China
The pictures in the listing are just for reference as we are selling multiple lots with same pictures.
***
Tektite
Tektitesare gravel-size bodies that are composed of black, green, brown or gray, natural glass that are formed from terrestrial debris ejected during extraterrestrial impacts. They are characterized by 1. a fairly homogeneous composition; 2. an extremely low content of water and other volatiles; 3. an abundant lechatelierite; 4. a general lack of microscopic crystals known as microlites and chemical relation to the local bedrock or local sediments; and 5. their distribution within geographically extensive strewnfields. Tektites generally range in size from centimeters to millimeters. Millimeters-size tektites are known as microtektites.
Although tektites are superficially similar to some terrestrial volcanic glasses (obsidians), they have unusual distinctive physical characteristics that distinguish them from such glasses. First, they are completely glassy and lack any microlites or phenocrysts unlike terrestrial volcanic glasses. Second, although high in silica (>65 wt%), the bulk chemical and isotopic composition of tektites is closer to those of shales and similar sedimentary rocks and quite different from the bulk chemical and isotopic composition of terrestrial volcanic glasses. Third, tektites contain virtually no water (<0.02 wt%) unlike terrestrial volcanic glasses. Fourth, the flow-banding within tektites often contains particles and bands of lechatelierite, which are not found in terrestrial volcanic glasses. Finally, a few tektites contain partly melted inclusions of shocked and unshocked mineral grains, i.e. quartz, apatite, and zircon, as well as coesite.
The difference in water content can be used to distinguish tektites from terrestrial volcanic glasses. When heated to their melting point, terrestrial volcanic glasses will turn into a foamy glass because of their content of water and other volatiles. Unlike terrestrial volcanic glass, a tektite will produce only a few bubbles at most when heated to its melting point because of its much lower water and other volatiles content.
Item SpecificsModified Item :NoCountry/Region of Manufacture :China
Payment Payment: By Paypal
Shipping cost Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Return policy Returns: We accept returns with any reason in 30 days. Buyer will bear the return shipping cost.
Messages We will answer messages in 24 hours during working days.
[ Policy: This is the contents of your policies.You can add a banner for this policy as header and add text descriptions here. The text descriptions can be different Font Size, Font Color, Style and even graphics and icons are also accepted. ]
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