At GoldCompany, one of the most common questions we’re asked is:
“How do I sell my gold?”
“How do I sell my silver?”
“How do I sell my diamond for the right price?”
It’s completely normal to feel uncertain about how to value your precious items. The good news is that understanding how prices are determined can help you make confident, informed decisions when it’s time to sell.
How to Sell Gold — The Basics
When it comes to gold, the calculation is actually quite straightforward.
Gold comes in various purities, measured in carats (ct). The highest purity is 24-carat (999.9 fine gold) — that’s pure gold.
To work out the value of your gold, follow these basic steps:
- Weigh your gold (in grams).
- Identify the carat or purity (for example, 9ct, 14ct, 18ct, 22ct, or 24ct).
- Calculate the fine gold content — multiply the weight by the purity percentage (e.g. 18ct gold is 75% pure, or 0.75).
- Multiply by the current gold price per gram.
Remember, gold prices are quoted per ounce (31.1 grams), so you can easily convert it to grams to estimate your item’s value.
At GoldCompany, we use real-time gold prices and test each item accurately to ensure you get the best possible return.
How to Sell Silver or Platinum
The same principle applies to silver and platinum.
- Sterling silver (.925) means 92.5% pure silver.
- Fine silver (999) is 99.9% pure.
- Platinum purity is often marked as 950, or 95% pure.
Once the purity and weight are known, it’s easy to calculate the metal content and multiply it by the current market price.
GoldCompany pays Sydney’s best prices for gold, silver, and platinum, and we test every item in front of you for total transparency.
Selling Diamonds — A More Complex Process
Diamonds are more intricate to value than gold or silver. Unlike metals, their worth depends on the 4Cs — carat weight, colour, clarity, and cut.
The first and most important step is to have a diamond grading report from a reputable laboratory, such as:
- DCLA (Diamond Certification Laboratory of Australia)
- GIA (Gemological Institute of America)
- HRD (Hoge Raad voor Diamant)
A grading certificate does not assign a price but provides an accurate quality assessment that can be compared to industry diamond price lists.
Tip: As a general guide, retail diamond prices are often about double the wholesale value.
If you don’t have a certificate, it’s highly recommended to get one — especially for larger or higher-value diamonds.
Selling a diamond without a grading report leaves you exposed to several risks, including:
- The possibility of stone substitution or misrepresentation by less reputable buyers.
- Buyers offering lower prices to offset uncertainty about quality.
- Significant value differences — a single grade in colour or clarity can affect price by up to 20%.
GoldCompany Can Help
At GoldCompany, our experts work with DCLA-certified professionals to ensure every diamond is accurately assessed and valued. Whether you choose to sell to us or not, we’re always happy to provide honest advice and free evaluations to help you understand the real worth of your jewellery.
Our goal is simple — to help you make informed choices and get the most for your gold, silver, or diamonds.
Call GoldCompany today for a complimentary consultation.
We’re here to help you every step of the way — with transparency, trust, and the best prices in Australia.
Contact us now or visit our Sydney office to find out what your valuables are really worth.
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