What an awesome phenomenon! These grow in caves, slowly forming the crystalline layers over centuries, dripping down over time. Chalcedony over quartz, super sparkly!
1 ) 394 GRAMS, 4 1/2 X 3 3/4 X 3 1/4"
2) 822 GRAMS, 6 X 4 1/4 X 3 3/4" BLUE INTERIOR
3) 1516 GRAMS, BIGGEST PIECE WE HAVE! Does not stand, still displays beautifully.