how is hematite cut and polished?
360652
Hematite is cut and polished just like any other rock/ore. I'm unsure how to go about removing marks from it though.
1103318
Well is there Kimberlite in the mine? Is it ultramafic rocks formed at phenominal heat and pressure? No? Then you aren't going to find a diamond in that mine if you would have in the first place. There's a reason they're rare.\n\nAnd beeswax? Nothing. That's not going to help you unless you want to use it to stop up your ears to drown out the machinery noise. Actually that's a good plan. You don't want to loose your hearing.
122456
Both of the other anwers are right, but I thought you might also like to know why the granite is harder and can scratch the marble.\n\nThe granite is made of crystals of the minerals quartz (harndness 7), feldspar (hardness about 6) and relatively small amounts of mica (hardness 2 to 3).  This is what geologists call granite; there are a lot of other stones that stonecutters call granite, but almost all of them are made of minerals that are nearly as hard as or even harder than the stuff in geologists' granite.  A higher hardness number means a harder material.  Talc, at 1, is very soft and diamond, at 10, is very hard.\n\nMarble is made of all or mostly calcite, which has a hardness of 3.\n\nSo when you rub the granite and marble together, most of the contact is between harder mineral grains in the granite and softer mineral grains in the marble, and the granite scratches the marble.
263675
I believe it is iron.  Not an expert though.
379936
tha splitting and multiplying of blood cells
92292
Gems - diamonds, rubies, emeralds, sapphires - just need to be cleaned and polished. They already exist in a usable form (after you cut and polish them.) You just need to wash the dirt away. \n\nOres are big piles of dirt that have bits of metal (iron, lead, silver, gold) in them. You have to refine the metal out and melt it into bigger pieces. It is a little like evaporating salt water to get salt.
33636
Steel is produced from iron ore. One of the greatest iron mines is found in Kiruna, Sweden, where an entire mountain of iron ore first had been mined aboveground and now in deep pits.\n\nThe iron ore is processed with coal in blast furnaces.  Molten iron is cast in bars and then rolled into huge sheets of metal.\n\nSteel is carbonized iron. It can be produced by tempering the iron in carbon.
312782
actualy it's very easy. most real alexanderite on the market is a brite green (like a good emerald) or a bluegreen which turns either a light red or light redish purple. Most of the time the color change isn't complete. The exceptiion would be the extreamly high end stuff. The color change is always subtle in natural stones.\n\nI've seen lab created stuff, it looks more like mystic topaz than actual alexanderite. i don't have any of the sites memorized but do a search on the stone to get an idea of what i'm talking about.
221514
Clean, melt, and remold
260032
The original was just electrochemical extraction.  THe current Haber process (called HGP - do a google search) has promise.
815831
There are 5 steps to take in mineral idenfication, they are: \n\nStep 1 \nDetermine the luster (metallic or nonmetallic) of your mineral. \n\nStep2 \nDetermine the hardness of your mineral. Using a glass plate, see if the mineral scratches it. Be careful, make sure the glass is on a table, do not hold in your hand. Firmly grasp your mineral and draw it over the glass. If the mineral powders, then use your fingernail to feel if the glass is scratched. \n\nStep3 \nDetermine whether your mineral is light-colored or dark-colored (nonmetallics only). \n\nStep4 \nDetermine whether your sample has cleavage. \n\nStep5 \nYour choices have been narrowed down, using the chart see which physical properties match up with your mineral.
291519
polish it with an industrial rotating sander.
825317
with hammer and chisel
1130702
Hematite is a silvery black stone.It was formerly known as bloodstone beause of the reddish 'soot' it leaves when it's worked on a lapidary wheel.It's a good 'worry stone'.It's great for grounding and for alleviating depression.Tigers eye is a good balance stone.It's main uses are for courage,energy and protection.It can also be used in money attracting spells.You can find either one in New Age shops or online.Both are pretty inexpensive.
494816
The best test is a streak test. If you are not familiar with this, it is when you rub the mineral across a piece of unglazed porcelain plate or tile.\n\nIn a streak test the gold will leave behind a gold streak while pyrite will leave behind a black one. This works, trust me, I know. All you need is a piece of unglazed porcelain.\n\nYou said earlier about rubbing it across the skin. I have never seen this work however some cheap jewlery is made of pyrite & will leave the fingers, etc. black looking. That is after you wear it a while.\n\nGold is very dense for its size. Pyrite is not nearly as dense. You could do a density test by displacement in water but I assume from what you told me that the "gold" is in a matrix.\n\nPyrite is usually found as a mass of cubic crystals. Sometimes they take on the appearance of a nugget b/c the cubes are very tiny. Gold will not have these cubes.\n\nGold is sometimes found in quartz veins. If you have a chunk of quartz it is possible that there is some gold in there.\n\nGo with the streak test & let us know what happens.\n\n:)
125282
Most efficient? If you don't have a lab, then I would assume just doing your best at grinding off the top layer, and trying to melt the shreddings down into a >70% gold alloy. Since gold's melting point is OVER 1000 degrees Celsius, I suppose your best bet is to heat the grindings as much as possible, and then pounding them together into a single mass (like a black-smith...or 'gold-smith'). But you have to realize HOW LITTLE gold is actually on there. The layer is so thin...sometimes merely 2-3 micrometers. You're gonna get a lot of impurities, such as nickel and copper. Gold-plating is usually done on copper or silver; and in the case of copper, a thin layer of nickel is placed below the gold. And since the melting point of nickel isn't that far from that of gold, and copper's is almost EXACTLY that of gold's, you're gonna get a random mixture of crap. I imagine the process is more trouble than it's worth. I'd just go buy gold from alfa aesar or somewhere like that for cheap-as-free.
223671
Very carefully... blood "dis -cray -shas".  Good luck!