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2. List of U.S. state minerals, rocks, stones and gemstones

   en.wikipedia.org/wiki/List_of_U.S._state...

   Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc. Not every state has an official state mineral, rock, stone and/or gemstone, however.

3. Tanzanite - Wikipedia

   en.wikipedia.org/wiki/Tanzanite

   Pleochroism. Present, dichroism or trichroism, depending on heat treatment. Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate ), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in ...

4. Move over diamonds, these little-known gemstones are ... - AOL

   www.aol.com/move-over-diamonds-little-known...

   Move over diamonds, these little-known gemstones are heating up. In 2016, jeweler Olivia Young of Ouroboros sold a red spinel ring for £6,000 ($7,700). Last year, the client’s insurance company ...

5. Charoite - Wikipedia

   en.wikipedia.org/wiki/Charoite

   Charoite (/ tʃ æ r oʊ. aɪ t / CHAR-ow-ait) is a rare silicate mineral with the chemical composition K(Ca,Na) 2 Si 4 O 10 (OH,F)•H 2 O, first described in 1978.It is named after the Chara River, despite its being 70 kilometres (43 mi) away from the discovery place.

6. ‘Mysterious’ purple lump found at ancient Roman ruins was ...

   www.aol.com/news/mysterious-purple-lump-found...

   The analysis identified it as an “incredibly rare” lump of Tyrian purple dye, also known as imperial purple, the company said in a May 3 news release. “For millennia, Tyrian Purple was the ...

7. Gold, copper hit records, silver nears 12-year high as metals ...

   www.aol.com/finance/gold-copper-hit-records...

   Ines Ferré. May 20, 2024 at 12:05 PM. Gold ( GC=F) touched a record high on Monday and silver ( SIL=F) prices neared 12-year highs as this year's rally in the metals market continues. Gold ...