Here is a nice bright yellow amber tear drop set in a one of Art Nouveau Ring Design. The stone used here is a hand cut tear drop and measures 18 by 13 mm or about 3/4 by 1/2 inch.
This one of a kind Custom Ring is a size 7 but can be sized from a 5 to an 8.
Amber is a fossilized resin from ancient trees, not tree sap, formed when resin hardened over millions of years in sedimentary deposits.