3,11 ct. "solitaire" diamond ring - - Jewels, watches and gold

Very important solitaire ring.
Solid 18K white gold
Diamond ct. 3,11, M color, VVS2 clarity

Exceptional handcrafted solitaire ring.
Solid 18K white gold
Diamond ct. 2,31, J color, VVS2 clarity
HRD certificate

Audemars Piguet Alinghi chain bracelet - limited edition
Designed by Kirsty Bertarelli, made by Audemars Piguet to commemorate the launch of the Alinghi, the America's Cup boat.
18 kt white gold with hallmark
Weight: 70.91 g
Length: 23 cm
Link width: 1.2 cm
In perfect condition.
It has three charms: a winch, boat, and the Alinghi symbol.
The winch has 90 diamonds of 0.03 ct, colour G, clarity VVS1, brilliant cut. Total: 2.70 ct
The Alinghi logo has 98 diamonds, colour G, clarity VVS1, brilliant cut, totalling 1.96 ct
All are natural diamonds, and the total weight of the bracelet is 4.66 ct.
Spring ring clasp.

Ring made of 18K white gold.
On four rows it bears "carrè" and "tapered" cut diamonds weighing over 4 ct.
At the center is a crystalline turquoise blue sapphire (weight 1.27 ct.), oustanding on a circle of brilliant cut diamonds (total weight 0.45 ct.).
Italian production of the second half of the 20th century

Engagement ring with six-prong setting, in 18 kt white gold.
Produced in Italy in the early twentieth century.

The shank and structure are elegantly engraved with vegetomorphic motifs
The stone, with excellent features, weighs 0.75 ct
Dimensions (mm): 5.01 x 4.28, pillow cut
J colour, VS2 clarity.
The item does not have any marks or hallmarks. The gold grade was tested with acid in a laboratory.