catapleiite
ck_admin
March 24, 2021
Discovered in 1850 in Norway, its name comes from the Greek “kata” and “pleios” which means “with many” in analogy with the fact that it is always associated with other minerals.
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cancrinite
ck_admin
March 24, 2021
It was identified in 1839 by a German mineralogist and named in honor of the Russian Finance Minister George Kankrin (1774-1845). This stone is particular : it is a silicate but effervesces with acid because it contains carbonates.
calcite
ck_admin
March 24, 2021
It is known since antiquity, its name comes from the Greek “khalx” for lime. Identified and analyzed from the seventeenth century and then by Rene-Just Haüy to its easy cleavage. Called Iceland spar, the crystals exhibit the phenomenon of double images: a feature seen through
chalcedony
ck_admin
March 24, 2021
Chalcedony: This is a term including microcristallines and cryptocrystalline varieties of quartz, which come from the Greek name of the famous city of Carthage “Karkêdon”. Extracted in Egypt and Syria, it has been used since ancient times for intaglios and cameos, an active trade with
