Brooch - pendant about 1900 - - Jewels, watches and gold

Brooch - pendant from the early twentieth century. It features a row of seven natural "Old Europe" cut diamonds and twelve "rose" cut diamonds.
Total weight of the diamonds ct. 1.85
Made of 18K white gold

French art decò diamonds ring.
Solid platinum
It comes with over 5 cts of extra white diamonds.
About 1920

Italian diamonds ring.
18K white gold
It comes with over 4,5 ct. of extra white diamonds.
The central stone is ct. 1,20; 5 stones between ct. 0,14 and ct. 0,18; 10 stones about ct. 0,10 each; 50 more stones for ct. 1,50 total.
Ring width 31 mm
Ring weight 10,8 gr.
About 1920

Refined dangling earrings with diamonds, "liberty" era.
Made of 18k white gold, they are set with natural brilliant cut diamonds.
Total weight of the stones over 4.5 carats.
Length 4.5 cm
Weight gr. 9.8

Remarkable collier with floral-inspired center, handcrafted in 18K white gold.
It brings diamonds for over 2 ct.
Russian production of the 1940s
Weight: 25 g.
Pendant lenght: cm 6,5
Width: cm 7