Group of gold and gem set jewels

pearl brooch:
gr. 9,6
cm 4,2 x 3,8
18kt

brooch:
gr. 3,6
cm 3 X 2,7
low-karat gold + silver

pair of red earrings:
gr. 4,6
cm 4,3 X 1,8
low-karat gold

pair of diamond earrings:
gr. 4,2
cm 2 X 1,4
18kt
18kt + silver

ring:
gr. 3,2
EU 54
low-karat gold

necklace:
gr. 3,0
cm 42,0
pendant cm 2,6
18Kt