
This is a Malachite stalactite cave, Kolwezi Mine 2005, from Katanga near Kolwezi, Democr. Rep. of Congo, Africa courtesy of the Collection of Willam B. Wray
en.wikipedia.org/wiki/Malachite
Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare, but occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occur.[5]
The stone's name derives (via Latin: molochītis, Middle French: melochite, and Middle English melochites) from Greek Μολοχίτης λίθος molochites lithos, "mallow-green stone", from μολόχη molochē, variant of μαλάχη malāchē, "mallow".[6] The mineral was given this name due to its resemblance to the leaves of the mallow plant.[7] Copper (Cu2+) gives malachite its green color.[8]
Malachite was mined from deposits near the Isthmus of Suez and the Sinai as early as 4000 BCE.[9]
It was extensively mined at the Great Orme Mines in Britain 3,800 years ago, using stone and bone tools. Archaeological evidence indicates that mining activity ended c. 600 BCE, with up to 1,760 tonnes of copper being produced from the mined malachite.[10][11]
www.mindat.org/min-2550.html
Here is information on Katanga DR Congo
www.mindat.org/locentry-1306408.html
www.visittucson.org/tucson-gem-mineral-fossil-showcase/
Every year the world-renowned Tucson Gem, Mineral & Fossil Showcase is like a time portal, a trip around the world, and a treasure hunt all rolled into one. Every winter, more than 65,000 guests from around the globe descend upon Tucson, AZ, to buy, sell, trade, and bear witness to rare and enchanting gems, minerals, and fossils at more than 50 gem show locations across the city. If you're planning a winter visit to Tucson, you won't want to miss this three-week-long event filled with shows, related events, a free day at the gem & mineral museum, and much, much more!
"Whether you’re looking for a $5 shimmering crystal necklace or a show-stopping $200,000 crystallized rock from an exotic location, the Tucson Gem, Mineral, & Fossil Shows have something for everyone.
www.visittucson.org/blog/post/gems-and-minerals/
www.tgms.org/show
The theme this year was Shades of Green- Experience the Magic. The theme for next year's show will be Red, White, and Blue Celebrate the Spirit of Minerals
xpopress.com/news/article/783/shades-of-green-70th-annual...
Green-colored gemstones are part of almost every mineral group. Famous members include emeralds (beryl); chrysoprase, bloodstone, aventurine, imperial jasper, kabamba jasper, and ocean jasper (quartz); green tourmaline; green sapphires; nephrite jade and imperial green jadeite; as well as tsavorite, grossular, demantoid, and drusy uvarovite (garnets).
There are also the soloists: malachite, amazonite, chrysoberyl, chrome diopside, maw-sit-sit, drusy liebethenite from Congo, fluorite, peridot, gaspeite, lime magnesite, seraphinite, prehnite, idocrase, and serpentine.
Green gems vary in hue, chroma (saturation), lightness, and tint, each with an identifiable green shade. They evoke memories of picturesque and scenic vistas, gardens, and lush meadows. Green is considered relaxing and pleasing to the eye and symbolizes nature, spring, healing, fertility, rebirth, and regeneration. It is linked to over thirty similes, idioms, and phrases used in everyday language.
TGMS 2025
Tucson Gem Show 2025