18K Diamond & Ruby Pendant Enhancer with Leo I Gold Solidus Coin

Crafted in 18k yellow gold, this pendant necklace features a striking design. The centerpiece is a 24k gold coin, encircled by a brilliant-cut diamond halo. The diamonds, with a total carat weight of 1.0, exhibit a F-G color grade and VS1-VS2 clarity. Accentuating the piece are cabochon-cut rubies, adding a touch of red. (Chain is not included.)
Measurements:
Length: 44.0 mm
Width: 26.5 mm
Total Weight: 20.8 g
Marked: ITALY 750 and the factory mark

Description of the Coin:
Leo I (AD 457-473).
From the fourth century on, the solidus was the preferred gold coin issued by Byzantine emperors. 
Gold Solidus, mint of Constantinople, AD 462-466.
Size: 21 mm
Weigth: 4.5 grams