Occupied Japan flat back flower in turquoise matrix glass 26x20mm pkg of 2. b5-558(e)

Flat back flower stones in turquoise glass with ribbons of brown and green, look like matrix turquoise. Hole in the middle, can take up to a 5mm bead or stone. 26x20mm. Occupied Japan, late 1940s to early 50s. Package of 2