The price will depend a lot upon size, shape, quality, color, and banding, cut or uncut. Good, brightly colored, banded Lakers can bring a pretty penny if you can find a collector that really wants it. Bland, dull colors and poor banding, little contrast = meh, it's just an agate. Consult a local rockshop or mineral club to see what it's worth.
This would depend upon a number of factors. Massive, or crystalline? Colorless, or colorful? Clear or opaque? Fractured or flawless? From the Swiss Alps, or from Arkansas? A buck a pound will get you good tumbling grade agate, but a well crystallized rose quartz specimen, or top grade rutilated quartz, or a nice Swiss smoky quartz crystal crowned with pink fluorite crystals... you can add two to four zeroes.
The face value of anything is whatever is written on it. The face value of a Pound, is a Pound.
they have a high value
It is 1 pound.
It is one pound!
You appreciate and value everything your superior says?
One Pound British in 1860 had the purchasing power of about £63.10 GBP in 2010. This is an approximation based on the value of the pound in 1860 and the value of the pound in 2010, factoring for inflation.
The face value of anything is whatever is written on it. The face value of a Pound, is a Pound. If you want to find out what the current exchange rate in US Dollars is for a British Pound, see the link below.
The value of the pound today July 24, 2014 against the dollar is $1.70. This refers to the British pound in comparison to the US dollar.
Value of a pound (weight) of silver
Troy Pound value would be about $15,811.20
You can't. "Unit" has no relative value to pound as such you cannot convert a unit to a pound.