18ct Gold Price per Gram in the UK
18ct gold is 75% pure — giving it substantially more value per gram than 9ct. Here's exactly how it's calculated.
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How the 18ct per-gram price works
18ct items are valued using weight in grams × 0.75 × the current gold market rate per gram. With three-quarters of every gram being pure gold, 18ct payouts are typically around twice the equivalent 9ct figure.
Refining and handling adjustments are smaller in percentage terms on higher-purity gold, which is part of why 18ct gives such strong returns. The exact figures are documented in your itemised offer.
For higher-value 18ct collections we can pre-quote against the current market and lock the figure for an agreed acceptance window once items have been weighed and tested.
Strong 18ct rates from a verifiable team
18ct is high-value gold. Every gram is weighed on calibrated scales by a named team at our flagship UK headquarters, with the figures documented in your offer.
HighStreetGold operates from its headquarters above the flagship Cash Generator store in St Helens town centre — a real, identifiable UK business with genuine premises, real staff and a public local reputation. You always know who is behind your valuation.
Frequently asked questions
Is 18ct worth twice as much as 9ct per gram?+
Roughly — 18ct contains exactly twice the pure gold of 9ct (75% vs 37.5%), so per-gram payouts are approximately double, before adjustments.
Does the 18ct rate change daily?+
Yes — like all gold valuations it tracks the live market through each trading day.
Is 18ct white gold valued the same as yellow?+
Yes. The gold content (75%) is identical; only the alloy and any rhodium plating differ.
Can I lock in an 18ct rate before posting?+
We can share the current rate at request and lock the figure once items arrive and are tested.
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