Strange object found with Mineoro 205

[Lake]

Density analysis

What about measuring objects density?

http://www.union.edu/PUBLIC/GEODEPT/hollocher/pedagogy/K-12_labs/Labs/KH2/KTH2.htm

Here is the formula:

Density = (Weight in air) / [(Weight in air) - (Weight in water)]

Here is also some mineral identification information:

http://webmineral.com/determin.shtml

[Leto]

Meteorites vs Minerals

Characteristics of meteorites are:

Metal - even stone meteorites contain small flecks of metal (iron-nickel alloy).

Density - most meteorites containing metal have densities greater than 3.3 grams per cubic centimeter.

Magnetism - most meteorites attract magnet easily even stony ones will attract a magnet on a string.

Fusion crust - when a meteorite falls through the Earth's atmosphere a very thin layer on the outer surface melts. This thin crust is called a fusion crust. It is often black and looks like an eggshell coating.

Chondrules - stone meteorites contain small balls of stony material called chondrules that are about milimeter in diameter

Remaglypths - sometimes when a meteorite falls through the Earth's atmosphere features called regmaglypts form on the surface. These look like thumbprints.

Examples of iron-bearing minerals which are very commonly mistaken for meteorites are magnetite and hematite. Both of these minerals are heavier than typical rocks and have some features which resemble meteorites. Other candidate judging on picture is Limonite whitch is not a true mineral, but a mineraloid, and it is composed by a mixture of similar hydrated iron oxide minerals, mostly goethite with lepidocrocite, jarosite, and others. By my experience all those minerals can be detected by IB or PI detectors as low conducting targets.

These minerals can be very readily distinguished from meteoritic material by a characteristic known as their streak. You can test the streak very simply. If you take a common ceramic tile, such as a bathroom or kitchen tile, it has a smooth glazed slide and an unfinished dull side which is stuck to the wall when installed. Take the sample that you think is a meteorite and scratch it quite vigorously on the unglazed side of the tile. If it leaves a black gray streak the sample is almost certainly magnetite, and if it leaves a red-brown streak it is almost certainly hematite. A meteorite, unless it is very heavily weathered, will not leave a streak on the tile.

[Esteban]

Leto, thanks for the input. I'll check all it and read in the web pages provided by Lake and Radioactive.

Hung, yes, all precious metals are in the range of the gold, but as are very rare an object in rhodium, for example, can't demonstrate easily. The only time I ear that a different metal than gold or silver was found with long range metal detector this consist in a platinum crown inserted in a small statue of a saint.

Another rare case was a rock with uranium found in a little mountain.