![cracked obsidian scalpel cracked obsidian scalpel](http://3.bp.blogspot.com/_t3UgfJM4dek/TNOALrVjUpI/AAAAAAAAEmc/_zIajPUfeLc/s400/Gemstones+Obsidian.jpg)
The name comes from the Latin word Obsidianus which is means the stone of Obsius, a Roman explorer. here is a link to an old forum discussion on obsidian scalpels with some. Obsidian is actually a volcanic glass that’s formed into an igneous rock. I have just recently been using the inter net to learn new things about the planet I live in so scientist like your self blogging information on the internet is so important.The information you share about rock hunts and observation is the closest some of us will be able to get. She discussed the use of obsidian blades for use in medical surgery procedures. I am finishing my second year this summer.I work with a tutor that can explain to me any graph or picture. But I did it anyway.Īs soon as I got to college and started studying earth science the entire science department took me in and met the challenge of teaching me science. But I found resistance from blind counclers and family because they could not see how I could posibly study some thing I could not see. I decided that I wanted to go to college and study what I wanted to completely unabashed. I am 42 years old and I went blind from gloucoma. I love your web sight and the information you shared about finding obsidion I always wanted to find osbidion that is bigger than a marble which is what I have always found in Utah when I was still sighted.
![cracked obsidian scalpel cracked obsidian scalpel](http://www.pugetsoundknappers.com/interesting_stuff/member_art/Russell_Thornberry/RT-2021/RT%20May2021/RT%20May2021-1.jpg)
Older falls may well have devitrified, but younger ones, such as the Pearlette of TX and OK, is still glassy at (I think) about 600,000 years. The resulting porous glass was densified by heating.īTW, the xtallinity of volcanic ash probably depends to a large degree on its age, and on the soil conditions, including the exposure to water. show that the killers blade had sliced Middaughs thyroid gland and fractured. Again, obsidian is essentially a rock form of glass.
#Cracked obsidian scalpel serial
The high-silica glass once (perhaps still) marketed by Corning was made as a alkali silicate glass, from which the alkali was leached by acid. A homeless father, a Marines death, and the making of a serial killer. In terms of the actual casting into a sword form, assuming one had the tooling and means to cool the melted obsidian down into the new form, the end product would be a very brittle sword form that was easily breakable just from trying to pull it out of the cast. Pure silica glass is very difficult to make, because silica melts at a very high temperature, and is so viscous it cannot be worked. Usually about 70% SiO2, depending on the formulation and intended use, the rest being alkalies to lower the melting point, a little alumina for durability, and perhaps colorants. But individual mineral grains of ferromagnesian minerals do occur, depending on the cooling conditions.Ĭommercial glass is not pure silica. From an old glass geologist: The black color of obsidian is due to iron dissolved in the glass, not generally as separate minerals.