commodities

kinds

gems

purity scanners: kinds: diamonds

metals

purity scanners: # ultrasound https://sdbullion.com/gold-and-silver-purity-testing-scanner-sigma-metalytics https://www.youtube.com/watch?v=DrHGqqr7v7c https://www.youtube.com/watch?v=40lPMVhQMdo ultrasound: https://www.youtube.com/watch?v=40lPMVhQMdo kinds: gold silver paladium tungsten

oil

# energy https://oilprice.com/ futures: WTI: https://oilprice.com/futures/wti/ ETF: short term: USO: https://robinhood.com/stocks/USO?source=search exploration & production: https://robinhood.com/stocks/XOP?source=search

natural gas

# energy Soy Beans: