Lihir gold limited
LGL® is a registered trademark used for Jewelry and owned by Leer Gem Ltd.
Lgl® is a registered trademark used for Jewelry and owned by Leer Gem Ltd.
probably a makers mark
It stands for Leer Gem Limited... A jewelry company in New York...
Lgl
Since we cannot see your ring, we cannot give you a definite answer- you would need a jeweler to examine the ring. HOWEVER- LGL is the registered trademark of Leer Gem Ltd. They did make a 10 karat gold ring. Some of those mounted a topaz stone. There is a very good chance that your ring is real.
Legal
The airport code for Long Lellang Airport is LGL.
Yes
You would use a measuring spoon or graduated cylinder to measure the capacity of a thimble. Fill the thimble with water and then pour the water into the measuring spoon or graduated cylinder to determine the volume.