Category Archives: Precious Metals

925 Gold Stamp? – Popular Jewellery Stamps and Hallmarks

Precious Metals
925 Stamp appearing on coin

Is there such as thing as a 925 Gold stamp? We are frequently asked to identify “Gold” jewellery featuring a 925 Gold stamp. When purchasing an item of unknown origin, there is sometimes uncertainty about the composition of an item of jewellery.  As a result, buyers look towards markings on items of jewellery. Within the Read the full article…

About Mark Johnson

My name is Mark and I'm founder at Serendipity Diamonds. I have 30 years or experience in polished diamonds and jewellery. Today, I work with an expert team in our Isle of Wight jewellery showroom located in Ryde. Most of my work involves helping clients in our showroom, working on our two websites and photographing jewellery commissions.

How Heavy is Platinum Compared to Gold? The density of Gold & Platinum

Precious Metals,
Gold and Platinum Bars

Gold and Platinum weights compared.  How heavy is Gold compared to Platinum? Also, what is the density of Gold compared to other precious metals? The same item of jewellery will differ in weight depending on the metal of composition. Metal type is an important detail when considering the cost per gram of precious metal alloys. Read the full article…

About Mark Johnson

My name is Mark and I'm founder at Serendipity Diamonds. I have 30 years or experience in polished diamonds and jewellery. Today, I work with an expert team in our Isle of Wight jewellery showroom located in Ryde. Most of my work involves helping clients in our showroom, working on our two websites and photographing jewellery commissions.

Rhodium Plating – Natural White Gold vs Rhodium Plated Gold

Precious Metals,

18ct Gold with and without Rhodium. Showing two twist ring mounts, prior to setting the diamond. (Left) with the Rhodium plating, (right) without. This is the true metal colour of 18ct White Gold. What is Rhodium plating? Most jewellery workshops apply Rhodium plating to white gold as a standard practice. This chemical element with the Read the full article…

About Mark Johnson

My name is Mark and I'm founder at Serendipity Diamonds. I have 30 years or experience in polished diamonds and jewellery. Today, I work with an expert team in our Isle of Wight jewellery showroom located in Ryde. Most of my work involves helping clients in our showroom, working on our two websites and photographing jewellery commissions.