Vintage crystal floral design giardinetti style brooch - bright colourful rhinestones set open-backed in silver tone on sale

Beautiful delicate vintage crystal floral brooch. Numerous lovely quality rhinestones, claw / prong set open-backed in shiny silver tone. The rhinestones are of various colours, including pink, blue, red, green and yellow, and in a variety of delicately set shapes.

The quality and colour of the rhinestones is outstanding and the design is delicate and detailed on sale. This piece is similar in construction to others I have listed (see below) and so my best guess is that it was made in around the 1930s because of Art Deco features. The silver tone does have the feel of rhodium plate which was used in Art Deco brooches through the 1930s. However I am very willing to be corrected if anyone can message me with more knowledge of brooches of this type.

Very good vintage condition.

Similar in construction to this Art Deco brooch in clear crystal:
https://www.etsy.com/uk/listing/1150653102/vintage-large-clear-crystal-art-deco?ref=listings_manager_grid

and this leaf brooch in citrine yellow:
https://www.etsy.com/uk/listing/706559072/large-vintage-crystal-leaf-design-brooch?ref=listings_manager_grid

and this Art Deco design brooch here:
https://www.etsy.com/uk/listing/766942604/huge-vintage-czech-crystal-art-deco?ref=listings_manager_grid