You don't have to capitalize everything you say like “RARE STONE” and it isn't very nice to have URGENT AND IMPORTANT as title. Not many would like to help you i think.
Put an explicit title like “Ancient Coin - Roman?”, “Elizabeth silver coin”, etc. Do not use generic terms such as “Help!”, “Coin”, “Identification”, etc.
In the content of your message, describe the subject and include any information you have:
Specify the weight, the dimensions and, if known, the composition.
Indicate what you can read in the item.
Describe the drawing as well as any information that might be helpful.
Attach a clear photo of sufficient size of each side of the item.