IPA: /kælˈsɛdənɪk/
KK: /kæl'sɪdɒnɪk/
Relating to a type of mineral that is a form of quartz, often used in jewelry and decorative items.
The artist chose a chalcedonic stone for the sculpture because of its beautiful colors.
Chalcedonic → It is derived from 'chalcedon' (from Latin *chalcedon*, meaning a type of mineral or gemstone) and the suffix '-ic' (meaning pertaining to). The word 'chalcedonic' refers to something that is related to or characteristic of chalcedony, a specific type of quartz.
Think of 'chalcedon' as the name of a gemstone, and remember that 'chalcedonic' means something related to that gemstone.