A Ceylon sapphire and diamond ring by Percy Marks, the oval cut…
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A Ceylon sapphire and diamond ring by Percy Marks, the oval cut sapphire of 7.26cts having five round brilliant cut diamonds channel set to each shoulder totalling 1.25cts, mounted in 18ct white gold, ring size N, accompanied by a GSL report stating there is no evidence of heat treatment to the sapphire. Condition: ring presents in excellent condition and stones are secure in their settings. sapphire is fine medium to dark colour with no evidence of heat treatment. Diamonds are colour F, clarity Vs. Signed Percy Marks to inside of shank.

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  • Brilliant Cut - In their naturally occuring state diamonds have little life or sparkle and for many centuries were simply cut in half and worn in amulets. Invented at the end of the 17th century by a Venetian diamond cutter, a "brilliant cut" diamond has 58 facets arranged in a regular geometric relationship, with 33 above the crown and 25 below on the pavilion.

    The introduction of the brilliant cut increased the popularity of diamonds in jewellery as it was the first cut to reveal the fire of the diamond, with the light being internally reflected from one facet to another, and was superior to the previously used table cut and rose cut.Variants to the brilliant cut have emerged since the end of the 17th century, but the popularity of the original brilliant cut has continued to the present time, where it is still the most commonly found cut.

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  • Shank - In jewellery, the shank of a ring is the hoop which encirles the finger.

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