Blue Lagoon and unknown brooch and earing set

These two brooches and earings belonged to my mother. She only wore them on Sundays or holidays. They are from I beleive the 1960s. The blue set is signed Sarah Coventry and is the blue lagoon. It origanally came with three earings and was a hostessn item. I only believe my mother had the two earings. The red set is unsigned and I am unable to find any info about who designed it.