Quartz (with moveable bubble), Crow's Foot near Broken Bow, McCurtain County, Oklahoma, Collected c. 1980s, Dr. David London Collection L-300, Miniature 2.3 x 3.5 x 4.5 cm, $100. Online 6/16
Really excellent example of a mobile fluid inclusion in quartz. The white arrow point to the spot where the bubble is enclosed but really it's so obvious one does not need the help to find it. Specimen exhibits characteristic hoppered form from this location and is essentially a floater with no clear attachment points. Looks like one small edge abrasion on one spot but it doesn't affect the display. Dr. David London Collection L-300. Collected c. 1980s from a closed locality.