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2. Quartz reef mining - Wikipedia

   en.wikipedia.org/wiki/Quartz_reef_mining

   Quartz reef breaking the surface at Paynes Find, Western Australia. Quartz reef mining is a type of gold mining in "reefs" (veins [1]) of quartz.Quartz is one of the most common minerals in the Earth's crust, and most quartz veins do not carry gold, but those that have gold are avidly hunted by prospectors.

3. List of types of marble - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_marble

   Karlík marble (karlický mramor), from Barrandien, Karlík, Prague-West District: black with gold-yellow-colour veins [d] Podol marble (Podolský mramor), from Vápenný Podol, Chrudim District: white, grey-white, rosy [e] Křtiny marble (křtinský mramor) from Křtiny, Blansko District: grey, rosy, reddish [f]

4. Marble - Wikipedia

   en.wikipedia.org/wiki/Marble

   Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO 3) or dolomite (CaMg(CO 3) 2) that have recrystallized under the influence of heat and pressure. [1]

5. Epithermal vein deposit - Wikipedia

   en.wikipedia.org/wiki/Epithermal_vein_deposit

   The Guanajuato Mining District, Mexico: This district has been mined for centuries and is known for its high-grade epithermal veins containing gold and silver. [11] The Baguio Mineral District, Philippines: This district is home to numerous epithermal vein deposits, including the Acupan Mine, one of the largest gold mines in the Philippines. [12]

6. Mother lode - Wikipedia

   en.wikipedia.org/wiki/Mother_lode

   The zone contains hundreds of mines and prospects, including some of the best-known historic mines of the gold-rush era. Individual gold deposits within the Mother Lode are gold-bearing quartz veins up to 15 metres (49 ft) thick and a few thousand feet long. The California Mother Lode was one of the most productive gold-producing districts in ...

7. Lode - Wikipedia

   en.wikipedia.org/wiki/Lode

   Gold-bearing quartz veins, Blue Ribbon Mine, Alaska. In geology, a lode is a deposit of metalliferous ore that fills or is embedded in a fracture (or crack) in a rock formation or a vein of ore that is deposited or embedded between layers of rock. [1]