Glass with embedded metal and sulfides
Glass with embedded metal and sulfides (GEMS) are tiny spheroids in cosmic dust particles with bulk compositions that are approximately chondritic. They form the building blocks of anhydrous interplanetary dust particles (IDPs) in general, and cometary IDPs, in particular. Their compositions, mineralogy and petrography appear to have been shaped by exposure to ionizing radiation. Since the exposure occurred prior to the accretion of cometary IDPs, and therefore comets themselves, GEMS are likely either solar nebula or presolar interstellar grains. The properties of GEMS (size, shape, mineralogy) bear a strong resemblance to those of interstellar silicate grains as inferred from astronomical observations.[fn 1]
References
- Bradley, John; Ireland, Trevor I (1996). "The Search for Interstellar Components in Interplanetary Dust Particles". Physics, Chemistry, and Dynamics of Interplanetary Dust, ASP Conference Series, Vol 104. pp. 275–282.
Footnotes
- ^ Bradley and Ireland, 1996
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techniques
- Float glass process
- Fritted glass
- Blowing and pressing (containers)
- Extrusion / Drawing (glass fibers)
- Glass wool
- Drawing (optical fibers)
- Precision glass moulding
- Overflow downdraw method
- Pressing
- Casting
- Flame polishing
- Chemical polishing
- Diamond turning
- Rolling
historic techniques
- Āina-kāri
- Art glass
- Glass art
- Beadmaking
- Blowing
- Blown plate
- Broad sheet
- Caneworking
- Cased glass
- Crown glass
- Cut glass
- Cylinder blown sheet
- Engraving
- Etching
- Enamelled glass
- Flashed glass
- Forest glass
- Fourcault process
- Fusing
- Glass mosaic
- Glassware
- Lampworking
- Machine drawn cylinder sheet
- Millefiori
- Mirror
- Polished plate
- Porous glass
- Rippled glass
- Satsuma Kiriko cut glass
- Slumping
- Stained glass
- Studio glass
- Tempered glass
- Radiative processes
- Opal formation
- Sea glass
- Shock metamorphic glass/Impactite
- Vitrified sand
- Volcanic glass
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