remove iron mineral from spring water making it crystal clear with no
filter or other machinery ?

This may be of interest:

"Thanks to microorganisms, it is possible to remove iron from water by
biological way. Indeed, there are many bacteria, whose metabolism and
thus their survival, are related to the oxidation of iron. However
this biological removal requires conditions specific for the pH, the
temperature, the redox potential, etc."

http://www.lenntech.com/iron-removal-physical-chemical-way.htm

The answer to this may be simpler than you think -- If you are looking
at iron mineral, then you have two options:

1) Let the water sit for a couple hours.  Iron is more dense than
water and will sink.  By decanting the water, you have crystal clear
water.

2) Use a magnet.  By placing a magnet at the bottom of your glass or
bottle, you will attract the iron particles.  Again, decant the water
and you have crystal clear water.

Of course, these two answers assume that you start with crystal water
with only iron.  If you have other dissolved minerals, this process
will not work so well.

Toufaroo-ga's suggestion may make the water crystal clear, but I think
it would still smell and taste of iron.

Two ways to remove iron minerals from water, both involve increasing
the chloride ion [Cl-] content in the water, thus causing the iron to
percipitate as iron chloride salts.
1. Bubble chlorine gas through the water, until clear, then pour off clear water.
2. Add salt (NaCl) slowly until all iron percipitates out. Water will
be a little salty, but crystal clear.

Chop a tree down and start a fire.  Boil the water and collect the
freshly condensed water using an iron-free condensing unit and
iron-free collection container.

Well, 
Fe2+ (ferrous) is highly soluble in water, Fe3+ (ferric) is almost
unsoluble in water. So the brown precipitation in ironholding water is
an Fe3+ salt.
Crystal clear water (eg from deep wells) sometimes contains high
concentrations of Fe. When comming in contact with the air, the Fe2+
oxidizes to Fe3+.

So the clue is to spray/vaporize/cascade the water containing Fe2+ in
a large reservoir and let is rest. All the Fe2+ is oxidated to Fe3+,
which can be precipitated (by resting). If you tap of water at the top
of your reservoir (a kind of spill or overflow valve) you have iron
free water without the use of any chemicals or filters.

http://www.haestad.com/hmicom/listserv/archive/default.asp~action/thread/messid/19615/v/n/searchid/43897

Use a strong magnet... he didn't say anything about the taste.