Geology, Jewelcrafting
02-October-2024 Wednesday
Popular science and simply educational literature: geology, mineralogy and other sciences about the Earth...
09-June-2023 Friday
Natural cut citrine
08-June-2023 Thursday
Blue Topaz "sky blue" cut
02-November-2022 Wednesday
Muzo aims to restore luster to Colombian emeralds
27-July-2022 Wednesday
Aura Opal: From Cleopatra to Queen Elizabeth II
20-July-2022 Wednesday
Ruby of the Black Prince or "Great Imposter"
01-June-2022 Wednesday
Fancy black diamonds
24-February-2022 Thursday
Turquoise: an ornamental blue stone that is becoming more rare every year
16-February-2022 Wednesday
Indigolit - the rarest and incredibly beautiful brother of tourmaline
09-February-2022 Wednesday
So rare: orange diamonds
08-December-2021 Wednesday
Lapis lazuli, a beautiful ultramarine stone
10-May-2021 Monday
THE ART OF COLOR: Green-Blue-Orange Chameleon – About Color-Changing Garnets
13-November-2019 Wednesday
Visual Quirks of Selenite
09-October-2018 Tuesday
mountain fire
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