as high, medium or low type; most common types are high
popular during the Victorian era
heat treated but the process is usually stable
for the 10th wedding anniversary
is limited in availability but comes in a vast array of
colors. Blue Zircon became popular during the Victorian
era, and jewelry from that time is a major source for
large specimens of zircon in today's market. Zircon is
usually faceted and has its own cut, the zircon cut, which
is a modified round brilliant cut with an extra set of
facets around the cutlet. One should avoid handling zircons
in a rough manner, as they are poor to fair in toughness.
Also avoid ultrasonic and steam cleaning. Zircon are often
heat treated but the process is usually stable. Major
sources for zircon are Kampuchea, Sri Lanka, and Burma.