[meteorite-list] MOLDAVITE COLORS
Hi, List, and Mike Gilmer who asked originally, Yes, Mike, it is the iron. Moldavites are high in Si02, usually close to 80%. that is, they have a higher glass content and fewer minerals. The most common other ingredient is Al203, from 8% to 10%. Fe0 makes up only 1% to 2%, and it is this iron-poor recipe that makes them green and gem-like. Moldavites range in color from a very pale green to a brown that can be as dark as a light Indochinite. The color is determined by an increase in the ratio of trivalent iron over bivalent iron over the range of the green-to-brown spectrum. The index of refraction and the density increases in the same way. Almost every type of splash-form known from the Australo-Asian strewnfield are found in moldavites as well, but drops and dumbbells are rare. There are Muong-Nong moldavites found in the Budejovice region, but no aerodynamic buttons have ever been found. Moldavites have many forms unique to them, like the leaf type. Moldavites frequently contain trains of gas bubbles, Occasionally, a two-colored moldavite is found, formed when two plastic moldavites collided in flight and stuck together. And Bog Haag has the one and only known YELLOW one. And while I typed this and checked the figures, the question was answered already... Sterling K. Webb - Original Message - From: Chris Spratt cspr...@islandnet.com To: meteorite-list@meteoritecentral.com Sent: Friday, December 10, 2010 12:15 PM Subject: Re: [meteorite-list] Mineral responsible for green color inMoldavite? I think it may be a form of Beryilium or Beryl. Chris. Spratt Victoria, BC __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Moldavite Colors
Sterling wrote: while I typed this and checked the figures, the question was answered already... .. nevertheless an *excellent* post and it added valuable information that had not been addressed yet (two-colored moldavites, for example)! Thank you, Sterling, for posting it! Bernd __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] MOLDAVITE COLORS
ok im dumd here. What is a muong nong tektite i know i spelled it wrong. What do they look like and what is the composition? On Fri Dec 10th, 2010 3:39 PM EST Sterling K. Webb wrote: Hi, List, and Mike Gilmer who asked originally, Yes, Mike, it is the iron. Moldavites are high in Si02, usually close to 80%. that is, they have a higher glass content and fewer minerals. The most common other ingredient is Al203, from 8% to 10%. Fe0 makes up only 1% to 2%, and it is this iron-poor recipe that makes them green and gem-like. Moldavites range in color from a very pale green to a brown that can be as dark as a light Indochinite. The color is determined by an increase in the ratio of trivalent iron over bivalent iron over the range of the green-to-brown spectrum. The index of refraction and the density increases in the same way. Almost every type of splash-form known from the Australo-Asian strewnfield are found in moldavites as well, but drops and dumbbells are rare. There are Muong-Nong moldavites found in the Budejovice region, but no aerodynamic buttons have ever been found. Moldavites have many forms unique to them, like the leaf type. Moldavites frequently contain trains of gas bubbles, Occasionally, a two-colored moldavite is found, formed when two plastic moldavites collided in flight and stuck together. And Bog Haag has the one and only known YELLOW one. And while I typed this and checked the figures, the question was answered already... Sterling K. Webb - Original Message - From: Chris Spratt cspr...@islandnet.com To: meteorite-list@meteoritecentral.com Sent: Friday, December 10, 2010 12:15 PM Subject: Re: [meteorite-list] Mineral responsible for green color inMoldavite? I think it may be a form of Beryilium or Beryl. Chris. Spratt Victoria, BC __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
