4C’s at O’Reilly’s

4C’s at O’Reilly’s

Carat – Carat is the weight of a stone. It is th unit of measure we use for diamonds and gemstones, where 1 carat = 0.2 gram. All other factors being equal, i.e., colour clarity and cut, prices for diamonds are usually given per carat. There are certain carat weights that cause a price jump, for example 0.99ct would be priced less than 1.00ct.

Colour – A diamond’s colour is observed along its greatest width. For colourless to near colourless diamonds, all other factors being equal, the more colourless the diamond the greater the value. With fancy colour diamonds the rarity, desirability and intensity of colour would affect the price. The introduction of impurities within the diamond such as nitrogen or boron can relate to the colour that is observed.

Clarity – The clarity of a diamond refers to a stone’s freedom from inclusions, graded from a scale of ‘flawless’ to ‘imperfect’. Internal characteristics or inclusions are features which are enclosed within the stone or extend from its surface. External characteristics or blemishes are found on the surface of the stone. The more inclusions and their size and position affect the clarity grade for each diamond and thus the price.

Cut – There are many aspects that go into the cut grade of a diamond. For example, the symmetry, proportions and the polish. The quality of the cut is an important value factor, with discounts being given for poorly cut stones, whereas excellent cut stones may fetch a premium. The better the cut the greater return of light, this will make the stone bright and lively and so improve the appearance of the stone. 

Lots

Lot 399: A DIAMOND SOLITAIRE RING, the oval diamond to four prong setting, mounted in platinum. Together with a GIA Report stating the diamond to be: 2.01 ct, colour and clarity: D, VS2, GIA # 1293345981 €15,000 - €16,000

Lot 226: A DIAMOND LINE BRACELET, the brilliant cut diamonds in 18ct white gold. Estimated: weight of diamonds: 10.46 ct, colour and clarity: G, SI, 7" long €11,000 - €12,000

Lot 398: A DIAMOND SOLITAIRE PENDANT, the brilliant cut diamond collet set in 18ct white gold, on a white gold chain. Estimated: weight of diamond: 2.17 ct, colour and clarity: J-K, SI3 €8,500 - €9,500

Lot 402: A PAIR OF DIAMOND STUD EARRINGS, the brilliant cut diamonds mounted in 18ct white gold. Estimated: weight of diamonds: 3.47 ct total, colour and clarity: I - J, SI1 €15,000 - €16,000

Lot 175: A DIAMOND SOLITAIRE RING, the brilliant cut diamond mounted in 18ct white gold. Estimated: weight of diamond: 4.01 ct, size M – N €23,000 - €25,000

Lot 174: A DIAMOND SOLITAIRE RING, the brilliant cut diamond to baguette diamond shoulders, mounted in 18ct white gold. Estimated: weight of principal diamond: 2.50 ct, colour and clarity: K, VS, size J – K €15,500 - €17,500