Two Victorian turquoise set dress rings

Two Victorian turquoise set dress rings, the first with turquoise and half pearl flowerhead clusters, 18ct gold mounted, hallmarked for Birmingham 1868, later inscribed to interior, the second with a turquoise and red stone flowerhead cluster, between turquoise set openwork foliate shoulders, gold mounted, (half pearls untested for origin), ring sizes K and L respectively (2)