1. Plural of chalcedony; a translucent or opaque microcrystalline variety of quartz, typically white, gray, or reddish in color, used in jewelry and decorative objects.
Usage: Geological/mineralogical term; Often used in the context of gemstones and mineral collections

Examples

• The museum's collection includes several beautiful calcedonies from around the world.
• Calcedonies were highly valued by ancient civilizations for making seals and amulets.
• The jeweler selected calcedonies in soft gray tones for the pendant design.
• These calcedonies display the characteristic waxy luster typical of microcrystalline quartz.
• Collectors often seek rare calcedonies with distinctive banding patterns.