yes it can. depending on how much the gold weight would be after melted down.
it is Melted and cooled then melted again
A real gold dollar from the 1800s would be worth at least $125 melted down, but would probably bring much more if sold to a collector. A modern Sacajawea or Presidential "golden" dollar is really made of brass. Melted down it would sell for about 15 cents!
Clear stamps are transparent when purchased whilst regular stamps are opaque and clear stamps are not normally sold in sheets as they are sold individually.
Stamps that represent a tax put in place but the state of which it is sold. Most stamps are transfered by means of heat.
With very hot flames or melted in a big hot pot.
No
the difference is that gold is yellow and it is hard and a diamond is hard too, but it is not as hard as gold and diamond can be any color
When the gold is something like a necklace it is, but when it is melted it is a liquid.
Certainly they are real - you can touch them and see them . . . I think you may have meant to ask if the gold on postage stamps is real. First, there is no postage stamp with gold on it . . . you are referring to 22k gold stamps made by people to sell to people who think they are buying something valuable. These are called replica stamps and are nearly worthless because no dealer will buy them.
they are melted and sold as scrap metal
you can recycled because it can be melted