EXAMPLE · 5 G NET 14K RING
$366.092.917 g fine gold · 5 g alloy × 14/24
Spot price · Nov 2, 1:22 PM UTC · gold-api.com
For a plain gold band, start with its measured alloy weight. For a stone-set ring, establish the metal weight separately from the stones. Ring size measures fit; it does not tell you how many grams of gold alloy you have.
YOUR METAL WEIGHT
2.917 g fine gold
10K, 14K and 18K ring value
Inside the shank: purity before ring size
Look inside the shank for a quality stamp such as 10K, 14K or 18K, or a fineness number such as 585 or 750. A maker’s mark is a separate identifier. A worn, missing or unclear stamp calls for a jeweller’s assessment rather than a purity guess from the ring’s colour.
Band width, thickness and hollow construction change the amount of metal at a given finger size. Weigh the actual ring rather than borrowing a weight from a size chart. If resizing or repair added or removed metal, use its current weight instead of an old receipt’s grams.
Plain band versus a stone setting
A plain, unfilled band has no gemstone deduction. An engagement ring may combine a shank, shoulders, prongs and a stone: the gold setting counts as alloy, while the stone does not. Keep an intact valuable setting for appraisal; do not remove stones just to use the calculator.
A net-weight example for a ring
An illustrative 6 g assembly with a confirmed 1 g stone and other non-gold content leaves 5 g of alloy. At 14K that is 2.917 g fine gold. If the stone weight is unknown, ask for a net-metal assessment; do not subtract a standard percentage.