Talk:Heavy mineral sands ore deposits

Excellent article. I added "silica" and "kyanite" to the list of trash minerals. Silica from experience is very prominent in placer HM's along the Eastern Coast of the US. Deekayfry (talk) 19:41, 25 December 2010 (UTC)

Titanium
Note the following quotation from the article: "Heavy mineral sands are a class of ore deposit which is an important source of zirconium, titanium, thorium, tungsten, rare-earth elements, the industrial-grade diamonds, sapphires, garnets, and occasionally precious metals or gemstones. "Heavy mineral sands are placer deposits formed most usually in beach environments by concentration due to the specific gravity of the mineral grains. It is equally likely that some concentrations of heavy minerals (aside from the usual gold placers) exist within streambeds, but most are of a low grade and are relatively small." Guess what! Titanium is not a heavy metal. Titanium is among the light metals that include lithium, beryllium, sodium, magnesium, aluminum, potassium, scandium, and vanadium. Many of the actual heavy metals are dangerous to life, such as arsenic, cadmium, indium, promethium, antimony, mercury, thallium, lead, polonium, radium, actinium, uranium, neptunium, and plutonium. For a multifarious one, plutonium is a chemical poison, it emits deadly radioactivity, and it is a carcinogen. These are what people commonly call "heavy metals" as in "heavy metal poisoning" and "radiation sickness". Many other heavy metals are quite benign, including zirconium, niobium, silver, gold, barium, tantalum, the platinum group, and bismuth, which are often used in medicine and dentistry. The only light metal that is known to be dangerous in small amounts is beryllium. 47.215.183.159 (talk) 08:44, 27 September 2017 (UTC)

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HMC vs THM
Is HMC the same as THM, and the South African deposit is 86% of 1.1% vs 30% of 1% for most other deposits? — Preceding unsigned comment added by 98.165.88.158 (talk) 18:11, 23 June 2020 (UTC)