Icy Diamonds |
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Here we are, in the midst of autumn and already preparing for our holiday shopping season.
In this newsletter, we would like to present a diamond variation: rose cut “icy” diamonds.
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The term “icy diamond”, also called a raw or rustic diamond, refers to stones that are crisscrossed with so many different coloured inclusions that they appear opaque (from the Latin word opacus = shaded). With this structure, the typical brilliance* of an inclusion-free diamond is altered, giving icy diamonds a more discreet appearance than their sparkling relatives. This is also the reason why they are much less expensive.
* Reminder: a diamond’s brilliance is composed of lustre (outer brilliance), total internal reflexion (internal brilliance), and the index of refraction.
In the case of icy diamonds, only the surface lustre is crucial. A good polishing, combined with colour and cut, bring out the charm of these stones.
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The Rose Cut – Find Out More
In most cases, icy diamonds are typically rose cut. This is a historical diamond cut which can occur in various forms, including, for example, round, heart, or pear-shaped. Rose cut diamonds are flat at the bottom with a dome shaped crown. A round rose-cut diamond resembles a rose-bud about to open - hence its name.
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The pairs of stones we are presenting here are particularly well suited to earrings or cuff links since, as the stones are flat, they are relatively light despite their size.
These pairs are each cut together from the same rough stone and then separated exactly down the middle with a laser. By using this process, we obtain pairs that fit perfectly with each other.
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1. Rose Cut Irregular / Gray / 0.88 ct / 5,21 x 4,57 x 2,03 mm
2. Rose Cut Irregular / Dark Gray / 1.08 ct / 5,30 x 5,22 x 2,12 mm
3. Rose Cut Irregular / Gray / 1.12 ct / 5,72 x 5,25 x 2,30 mm
1. Rose Cut Pear Shape / Reddish Gray / 1.97 ct / 9,50 x 6,39 x 1,78 mm
2. Rose Cut Pear Shape / Red Brown / 2.30 ct / 9,74 x 6,70 x 2,44 mm
3. Rose Cut Irregular / Gray / 2.43 ct / 8,21 x 7,11 x 2,15 mm
1. Rose Cut Irregular / Brownish Gray / 2.38 ct / 7,59 x 7,45 x 1,99 mm
2. Rose Heart Shape / Black Brown Gray / 3.24 ct / 7,61 x 9,41 x 2,88 mm
3. Rose Cut Irregular / Green Gray / 2.91 ct / 12,56 x 6,30 x 1,70 mm
1. Rose Cut Irregular / Red Brown / 6.00 ct / 14,70 x 7,19 x 3,00 mm
2. Octagonal (Step Cut) / Blackish Brown / 11.94 ct / 11,90 x 10,40 x 5,31 mm
3. Rose Cut Pear Shape / Dark Orangy Brown / 8.22 ct / 15,18 x 11,74 x 2,60 mm
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In addition to the pairs presented here, we also carry round rose-cut stones in sizes varying from 2,00 mm to 5,50 mm, in shades of grey, yellow, green, and red.
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Some Examples of Jewellery
Ring by DOMINIK STEINER in Winterthur
Red and white gold,
centre stone diamond, 1.43 ct, old cut, colourless
Icy diamond, round rose-cut, 34 pieces
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Earrings by ATELIER GRUPP in Munich
White gold / black rhodium, brilliants in fancy white
Pair of Icy diamonds, grey
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Square Emerald Cut / 0.52 ct / VVS2 / Fancy Dark Greenish Gray /
4,50 x 4,48 x 2,80 mm / GIA
Oval / 0.57 ct / VS2 / Fancy Vivid Yellow /
6,17 x 4,57 x 2,59 mm / GIA
Cushion / 1.25 ct / SI1 / Fancy Grayish Yellowish Green /
5,90 x 5,55 x 3,86 mm / GIA
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