Rare vintage Czech crystal brooch in various colors, discount

An interesting arrangement of bluish-green, purple crystals combined with gold-colored metal. The color changes depending on the lighting. Brooches of this type are rare. After googling, I found that it could have been created in the Czech Republic around the 1930-40s, I don't know how reliable that is, but in any case, this brooch is older than Bohemian glass brooches created in Czechoslovakia. Small, approximately 2 cm in diameter.