Post by 1dave on Feb 3, 2015 11:31:22 GMT -5
From Winter 1987 Gem News International"
Fig 4.
a note in RockhoundBlog says that Jack is now at odds with Tempe City because of rocks in his back yard!
The "Lowell" effect in amethyst. Jack Lowell, of the Colorado Gem and Mineral Company, Tempe, Arizona, has identified an unusual, previously unreported, phenomenon in amethyst from Artigas, Uruguay.
This adularescence-like phenomenon (figure 4) is strictly confined to the area in, and immediately around, the minor rhombohedra1 faces of the amethyst that show it; it may be related either to twinning or to ultra-fine growth structures within these zones, or both.
GIA will continue to study this "Loweell" effect and would welcome any information from Gem News readers regarding previous publications on this phenomenon or observations of it in amethyst from other localities.
This adularescence-like phenomenon (figure 4) is strictly confined to the area in, and immediately around, the minor rhombohedra1 faces of the amethyst that show it; it may be related either to twinning or to ultra-fine growth structures within these zones, or both.
GIA will continue to study this "Loweell" effect and would welcome any information from Gem News readers regarding previous publications on this phenomenon or observations of it in amethyst from other localities.
Fig 4.
a note in RockhoundBlog says that Jack is now at odds with Tempe City because of rocks in his back yard!
Lowell Effect on Amethyst Author Needs Your Support
Filed under: regular postings — Gary December 20, 2011 @ 3:36 pm
I came across this rockhound on FaceBook (Jack Lowell). I do not know the whole story but people are showing their support by emailing Tempe City Council- Hugh_Hallman@tempe.gov . More info can be found on his facebook page:
www.facebook.com/jack.lowell1?sk=wall
Filed under: regular postings — Gary December 20, 2011 @ 3:36 pm
I came across this rockhound on FaceBook (Jack Lowell). I do not know the whole story but people are showing their support by emailing Tempe City Council- Hugh_Hallman@tempe.gov . More info can be found on his facebook page:
www.facebook.com/jack.lowell1?sk=wall
Rodney Moore 9:01am Dec 19
Hey everybody :
Jack is a friend of mine and he is pretty famous for having worked as a miner and managing the arizona four peaks mine. He is the one that is attributed as publishing and documenting “the lowell effect” on amethyst. Anyways, jack is about half-crazy ( but a good guy). I bet his back yard IS a mess. Anyways, it looks like the city is hassling the dude. Can you send off an email? Maybe share this with your friends. Here is what I (Rodney Moore) wrote : Hi, A friend of mine, Jack Lowell, has posted something on facebook about an issue the city has with Jack and some rocks in his backyard. It looks like this is going viral with word traveling thru the extended rockhounding community with many expressing concern if not even outrage. It would seem like the city would have bigger issues to worry about ( such as crime) than some rocks in a guys backyard. Please ponder this a bit. Thanks! Rodney Moore
Hey everybody :
Jack is a friend of mine and he is pretty famous for having worked as a miner and managing the arizona four peaks mine. He is the one that is attributed as publishing and documenting “the lowell effect” on amethyst. Anyways, jack is about half-crazy ( but a good guy). I bet his back yard IS a mess. Anyways, it looks like the city is hassling the dude. Can you send off an email? Maybe share this with your friends. Here is what I (Rodney Moore) wrote : Hi, A friend of mine, Jack Lowell, has posted something on facebook about an issue the city has with Jack and some rocks in his backyard. It looks like this is going viral with word traveling thru the extended rockhounding community with many expressing concern if not even outrage. It would seem like the city would have bigger issues to worry about ( such as crime) than some rocks in a guys backyard. Please ponder this a bit. Thanks! Rodney Moore