De waardefactoren
Een taxateur weegt bij deze categorie een vast aantal criteria. Hieronder leggen we ze uit, in de volgorde waarin ze doorgaans worden bekeken.
Fineness: what the mark tells you
In the Netherlands the common finenesses are 14 carat (585 parts per thousand) and 18 carat (750). British work adds 9 carat (375), 15 carat (625, only between 1854 and 1932) and 22 carat (916); French work is usually 18 carat with an eagle's head. Fineness directly determines how much fine gold the ring contains: a 6 gram ring in 18 carat holds 4.5 grams of pure gold, the same ring in 9 carat only 2.25 grams.
A 15 carat mark is also a free dating clue: that standard existed only in that British window, placing the piece firmly in the second half of the nineteenth century. Country-specific marks are set out in the hallmarks hub.
Weight and hollow construction
Two rings that look identical can differ threefold in weight. From the 1960s many rings were made hollow or with a thin wall to save material. That is not deception, but it halves the material value. You recognise it by the light feel in the hand, a seam on the inside, or a slightly dentable top.
Always weigh the ring yourself before accepting an offer. A kitchen scale with one decimal is accurate enough for an indication; the buyer weighs to hundredths.
Day rate and what a buyer actually pays
The gold price is quoted per troy ounce (31.1 grams) and moves daily. Convert the rate to euros per gram of fine gold and multiply by the fineness. A buyer does not pay one hundred per cent of that: eighty to ninety-five per cent is usual, depending on quantity, fineness and whether the piece is directly resaleable or must be melted.
Always ask for both the percentage and the weight used. A slightly low weight combined with a slightly low percentage can cost twenty per cent without being noticed.
When collectors' value exceeds the gold price
There are four signals. Handwork — visible engraving, guilloché, hand-set stones, small irregularities in symmetry. Period features — millegrain edges, rose or old brilliant cuts, closed settings with foil beneath. A signature or maker's mark beside the fineness mark. And a pronounced form attributable to a decade.
If you see two or more of these, do not sell the ring by the gram. More in the article jewellery worth more than the gold price.
Coloured gold and alloys
Rose and red gold owe their colour to a higher copper content, green gold to silver. In the 1930s and 1940s rose was dominant; in the 1980s three-colour work appeared. Colour is irrelevant to material value — fineness is fixed — but it does drive saleability. Rose from the retro period is currently sought after, 1990s white considerably less so.
Condition, size and wearability
A thinned shank, a crooked head or a badly soldered seam cost money, because the buyer deducts the repair. On a ring with mainly material value, condition matters little — it goes into the crucible anyway. On a collectable it matters entirely: there an unrestored, honest condition is worth more than a heavily polished example.