A group of dark red-brown chabazite crystals perched on basalt, with tiny pearly heulandite crystals in association. Many of the crystal faces are lustrous, while some have a slightly frosted look. Some of the crystals exhibit penetration twinning, and a small one on the front of the largest exhibits contact twinning (not common for the locality). In very good condition, with contacts/incomplete crystals around the periphery. A nice specimen, stands for display as photographed.
About These Red Chabazites From Wasson’s Bluff
In one relatively small zone at Wasson’s Bluff, the chabazite crystals are a particular dark red hue – more intense and lighter than a brown, and most are a bit deeper and darker than a brick red or deep orange. This zone has produced sporadically over history. Most often, days of very hard work in this area yield absolutely nothing, but a few isolated finds in recent years have produced a small number of excellent pieces – these specimens are from those finds.
In historic times, these particular deep-coloured chabazites from Wasson’s Bluff were known as “acadialite”, named for Acadia (which is the English for L’Acadie, the colonial-era name for this part of Canada). The name “acadialite” is sometimes still seen on older collection labels, sometimes as a species name and sometimes as a varietal name. Under current nomenclature, these specimens are known as chabazite, with “acadialite” now considered a historical synonym.