how can you tell if its petrified wood?
479604
Petrified wood is a type of fossil: it exists of fossil wood where all the organic materials have been replaced with minerals (most often a silicate, such as quartz), while retaining the original structure of the wood. The petrifaction process has occurred underground, when wood became buried under sediment. Mineral-rich water flowing through the sediment deposited minerals in the plant's cells and as the plant's lignin and cellulose decayed away, a stone cast was formed in its place.\n\nMinerals such as manganese, iron, and copper in the water/mud during the petrification process give petrified wood a variety of color ranges. Quartz crystals are colorless, but when iron is added to the process the crystals become stained with a yellow or red tint.
664073
A certified appraiser would have to look at it to determine that.  There are several factors that go into gem values and without actually looking at it, no one will be able to tell you.  Any guess would be just a shot in the dark.
313531
It is Gram positive (stains purple after a Gram stain), has endospores (can tell from a simple stain or from a Schaffer-Fulton endospore stain), and is rod-shaped.
759217
Burn it in a sprectrophotometer.  Look at the emitted light.
157272
It very well may be surface only discoloration...buff an area and see.Just because it blued a little is no reason to think it is contaminated deeper. The blueing is oxadation due to the heat.
1048589
I cant tell you its value, but go to a geological estimator and ask to have a carbon test done for an estimated date of formation. With that date, an accurate value will be easier to ascertain with the services of an experienced fossil valuator.
258414
You can't find one that easily, I'ld advise you to talk to a realy good carpenter whose been a carpenter for more than 10 years and ask him to go through your wood list with you and tell you which types of wood absorb faster or more than the others.
465462
OK, first geography is NOT geology *sigh*\n\nLook up carbon dating; you can either tell by the degradation of carbon or by basic layering (what's on the bottom is older than what's on the top).
612660
One method that you can use to determine what type of fabric you have is a "burn test." For example, most natural fabrics will burn, but not melt. In contrast, man-made fibers often shrink away from the flame and melt. You can tell more about the fabric by the smell they produce. (see first source for details). \n\nFabrics are often evaluated by their thread count which is the number of threads in a square inch. The higher the thread count, the softer the fabric will feel. However, higher thread count fabrics won't be as strong as those with lower thread counts because the threads are thinner. (see second source for details).
864771
http://www.stonecareuk.net/propertiesofstone.html\n\nHope this site is of help to you
363455
Petrified Forest.\n\nIt is a National Park in northeastern Arizona that contains one of the largest collections of petrified trees in the world (formed by the process described in your question).  It is right next to the Painted Desert - a area of multi-colored ridges and hills.
189386
"Wood is a complex physical and chemical structure. Its overall elemental composition by mass is about 49% carbon, 6% hydrogen, and 0.2% nitrogen; the remaining elements and their amounts and forms vary considerably from one species of tree to another."  From the Source.\n\nThey want you to say that it is because oxygen is consumed when the match burns.  However, that is wrong.  When the match burns, C and H in the wood is burned to make CO2 and H2O.  CO2 is a gas with the same volume as the O2 from which it was created.  H2O is a gas with TWICE the volume as the O2 from which it was created.  However, the H2O condenses to a liquid that has negligible volume, hence, there is a volume loss.  Notice, though, that wood is only 6% H.  That means that the volume loss due to the creation of H2O is very small.\n\nAlmost all of the volume change occurs because you trap heated air when you put the glass over the burning match.  When the air cools, it contracts.\n\nYou can test this for yourself by rigging a glass with a snuffer inside.  Rig it so that when you put the glass over the match the candle is snuffed out.  Thus, no O2 in the glass is consumed.  The water level will rise as in the case without the snuffer.\n\n(Don't blow out the match then put the glass over it.  This will blow away the heated air that is trapped when you put the glass over a burning match.)
768664
May be a tunning fork
582308
The methusla tree, a Joshua Pine in Israel is said to be more than 3000 yrs old.  They keep exactly which one it is a secret though, so it's not plundered.\n-Duo
321773
Southern White Pine.\n\nKnown for it's strength and height. Your best sturdy boards are made of it. ..and cost worthy.
438553
Well you need to give some identifying characteristics before anyone can ID it for you.\n\nDoes it have crystals?\n\nDoes it rub off in your hand when you hold it?\n\nWhat color is it? Does it contain more than one color?\n\nDoes it have layers?\n\nIs it heavy for it's size?\n\nGive some more info & maybe we can help.\n\n:)
876299
It is not a type of tree that produces what you are looking for.  It is a process of converting the wood/pulp to papper and layering it with layers of plastic to give it those properties.