2007-02-18 15:50:45 · 2 answers · asked by Gideon 1 in Science & Mathematics ➔ Earth Sciences & Geology
Two or more intergrown crystals of same mineral. Penetration twinning is one crystal growing into another related by a rotation axis: common with orthoclase. Contact twinning is mirror image crystal twins related by a mirror plane: common with quartz. Cyclic twinning--repeated or multiple contact twins related by rotation axis: common with aragonite.
http://classes.colgate.edu/rapril/geol201/summaries/twinning.html
http://nsminerals.atspace.com/twins.html
http://www.galleries.com/minerals/twins.htm
2007-02-18 15:59:28 · answer #1 · answered by luka d 5 · 0⤊ 0⤋
A twinning whisp it is a type of an inclusion
like a nic or a chip.
Ok so I am a gem freak....
it is my favorite inclusion it looks like cotton candy inside of a gem. I see it in a lot of diamonds.
2007-02-18 16:01:01 · answer #2 · answered by tasgunter 3 · 0⤊ 0⤋