1890s Victorian Gold Filled Brooch With Mystery Stone

Gold filled setting.
Oval blue green stone.
1890s brooch.
Repairs in the 20s or 30s.
Piece of gold overlay on corner.
New pin back and closure.
Rough spots on back.
Must have been significant to a former owner,
Okay antique condition with repairs.
Measures approximately 1.5 inches by 1 1/8ths inches.