“Xls to 0.8-9 mm. Via Jean-Pierre Beckerich MOB coll. Relatively simple (but still srtriated and twinned) xls from the Poudrette pegmatite. Associated with disgustingly drab olive siderite rhombs and albite. There is a stereo child photo. ”

“Xls to 0.8-9 mm. This is a stereo child photo.”

“Xl ~ ½ mm tip to tip. This is a child photo. This is about as close as you will get to a single (untwinned) xl - but it's still twinned as indicated by the striations. The photo is made using a single shot - no stacking - as a trial. Stacking didn't help much but I decided this was mildly useful as is. (From a different specimen from the same find.)”