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Neuengasse 38, CH-Bern
Neuengasse 38, CH-Bern
Gold Jewelry > Gemstones > Diamond
«A girl's best friends» (quoting Marilyn Monroe)
Diamonds in the processed form of a solitaire or alliance are the absolute classics among pieces of jewelry: timeless and yet always up-to-date – a real pleasure.
Group: Diamond
Colors: White, gray, yellow, black and pink
Hardness: 10/10 Mohs
We differentiate between old cut, diamond cut and brilliant cut.
Old cut diamonds are cut in such a way that their natural size can be optimally handled but contain fewer facets. Old cut diamonds sparkle less since most of the light passes out of the sides. The diamond reflects light much more intensively by cutting larger and smaller facets. The difference between diamond and brilliant is simply the number of cuts: a diamond with more than 58 facets becomes a brilliant cut diamond, hence the term brilliant.
Diamonds are graded based on four criteria (4Cs), which determine their value.
Precious stones are measured based on their weight in carats. Extremely precise diamond scales are used for this purpose, which can accurately determine the weight to 0.001 grams.
You can use the following overview to calculate a rough carat estimate for a diamond/brilliant.
| Diameter | Carat | Diameter | Carat |
|---|---|---|---|
| 1.4 mm | 0.01 ct | 6.5 mm | 1.0 ct |
| 2.0 mm | 0.03 ct | 7.4 mm | 1.5 ct |
| 3.0 mm | 0.10 ct | 8.2 mm | 2.0 ct |
| 4.1 mm | 0.25 ct | 9.3 mm | 3.0 ct |
| 5.1 mm | 0.50 ct | 10.3 mm | 4.0 ct |
| 5.9 mm | 0.75 ct | 11.1 mm | 5.0 ct |
The clarity of a diamond is separated into different grades - the subtle differences can only be seen by the trained eye.
All of our larger, and therefore more exclusive, diamonds/brilliants are inspected, certified and valued by external specialists.
| Abbreviation | Meaning | Explanation |
|---|---|---|
| Fl | Flawless | At ten times magnification flawless (neither external defects nor inclusions). |
| If | Internally flawless | Flawless with surface traces of processing. |
| Vvs1 | Very, very small inclusions | At tenfold magnification, inclusions are only very, very difficult to detect. |
| Vvs2 | Very, very small inclusions | At tenfold magnification, inclusions are only very difficult to detect. |
| Vs1 | Very small inclusions | At tenfold magnification, inclusions are only difficult to detect. |
| Vs2 | Very small inclusions | At tenfold magnification, inclusions are detected. |
| Si1 | Small inclusions | At tenfold magnification, inclusions are easy to detect. |
| Si2 | Small inclusions | At tenfold magnification, inclusions are detectable, but not with the naked eye. |
| Pi1 | Piqué 1 | Inclusions are visible, but do not diminish the brilliance. |
| Pi2 | Piqué 2 | Inclusions are visible, diminish the brilliance slightly. |
| Pi3 | Piqué 3 | Inclusions are visible, diminish the brilliance considerably. |
To the untrained eye, diamonds appear mostly colourless although almost all of them have a light to intense hint of green, brown or grey. The colour fine white+ is the most valuable.
| Old | River | River | Top Wesselton | Top Wesselton | Wesselton | Top Crystal Crystal | Top Crystal Crystal | Top Cape | Top Cape | - |
|---|---|---|---|---|---|---|---|---|---|---|
| CIBJO | Exceptional white+ | Exceptional white | Rare white+ | Rare white | White | Slightly tinted white | Slightly tinted white | Tinted white | Tinted white | Tinted |
| GIA | D | E | F | G | H | I | J | K | L | M |
The so-called cut is the final criteria when determining the value. A good cut is characterised by the proportion between the table, facets and rondist.