Montana Sapphire
The latest Gem Note dives into the differences in sapphires sourced in Montana and why it’s so hard to price Rock Creek and Missouri River corundum.
Gem NotesCassiterite
It’s a common mineral, found on every continent, but faceting rough is rare—unfortunate, since its lighter versions can display dispersion almost twice that of diamond.
Gem NotesTrapiche Emerald
Trapiche emeralds are far from common and generally not available “off the shelf;” availability is sporadic at best.
Gem NotesPezzottaite
Named after Dr. Federico Pezzotta from the Natural History Museum of Milan for his work on Madagascar’s granitic pegmatites, this rare mineral species is relatively new.
Gem NotesJeremejevite
Introduction: Jeremejevite is not well known among the general public and it is safe to say, it is not a common gem seen or familiar within the gem and jewelry industry. Unlike many gems within the…
Gem NotesAragonite & Calcite
Just as graphite and diamond have the same chemical composition but crystallize in two different systems, so is the case with aragonite and calcite
Gem Notes