MAN-MADE GLASS

Written By Aubrey Whymark 2007-2017
Made-made glass is first recorded in Egypt some 5,500 years before present, with hollow glass production from 3,500 years before present. Glass blowing commenced around 2,000 years ago. At one time it was suggested that Moldavites were in fact man-made glasses. Other less attractive man-made glass is formed as the by-product of smelting metals such as iron and is known as 'slag'. Slag is commonly mistaken as a meteorite.

Understanding how glasses of different chemical compositions behave when they are cooled and heated is key to tektite studies. Input from professional glassmakers/experts would probably go a long way to understanding sculpture on tektites. Hal Povenmire also points out the problem of Stokes's Law, which deals with the way bubbles rise in a liquid, in relation to tektite formation. The argument is that pure tektite glass could not form, as bubble free as it is, in such a short time as invoked by the impact hypothesis. To counter this I would suggest that the huge velocities of ejection and centrifugal forces need to be taken into account.

Murano Glass

Murano glass is glass made on the Venetian island of Murano and is world famous. It has been made there since 1291, although glass has been made on Venetian islands since at least the 8th Century. Glass making secrets (such as ingredients for certain colours) were kept secret within families and the employment of foreign glassmaker's was prohibited.
 
ABOVE: A variety of glasses from the Victoria and Albert Museum in London.

Hiroshima and Nagasaki Artifacts

The sale of artifacts from Hiroshima and Nagasaki draws criticism from survivors and relatives of victims of the two atomic blasts in Japan. Such items should serve to remind us of the horrors of war. Atomic blasts do, however, draw similarities to impact events and trinitite from test atomic blasts remains collectable. 
 
ABOVE: Antique 'Onion' Bottles in the Victoria and Albert Museum in London. Kind of similar to Onion tektites.
ABOVE:  A bowl that was partially melted in the Hiroshima Atomic Explosion. This is located in the Science Museum in London. Meteorite impacts are similar in many ways to atomic blasts, where a large amount of energy is released in a short time. When atomic blasts melt the ground an impactite-like melt rock called 'Trinitite' is formed.
ABOVE: Two pieces of glass formed by the melting of desert dune sand by a controlled gas flare during drilling operations in the Middle East. Note the absence of any flow structure. It was melted in situ. Interestingly the bubbles and layering do not resemble Moung Nong tektites, which were not formed in situ.
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ABOVE: Melted desert sand in another oil field. This was melted by a controlled flare. Note the granular structure where less melted. Note the bubbles. Note how the molten sand has flowed in places (it was in a sloped flare pit). Please click on the gallery for more images.