Show sample as: 72-frame QuickTime VR or 360-frame QuickTime movie loop.
Periodic Table Poster   My periodic table poster is now available!Periodic Table PosterPeriodic Table PosterPeriodic Table Poster
3D3DSoda-lime glass Medallion.
I made this medallion for an article in my Popular Science column, using a charcoal grill to melt the ingredients (silica sand, washing soda and limestone) together into soda-lime glass. Once melted I pressed the glass (darkened by ashes from the fire) into a graphite mold I had machined and heated in the fire.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 26 October, 2008
Text Updated: 26 October, 2008
Price: $1
Size: 2.5"
Composition: SiO2+Na2CO3+CaCO3