Vintage 1920-1930 circa diamond ring

One electronically tested 18KT white gold lady's cast manufactured Diamond ring with a high polished finish. The vintage 1920-1930's circa ring features an early modern brilliant cut diamond secured by four tip chevron prongs. The remaining ring has a pierced filigree design followed by a partially carved design. The overall measurement is 6.67mm tall, 8.38mm across tapering to 1.13mm at the base of the ring. Trademark is none. Condition is good. One early modern brilliant cut diamond, measuring 5.00 - 4.90 x 3.12mm approximate weight of 0.47 ct. Color H-1, Clarity VS-2, Cut Good, Depth 63.0%, Table 54.6%, Crown angle 35.0 Degrees, Polish Good, Symmetry Good. Total Weight of Diamond 0.47ct. Total Weight of Ring 2.21gm. Gold @ 1,297.70 US