All posts by Mark Johnson

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.

What is a 950 Stamp? – PT and PLT 950 Hallmarked Jewellery

Platinum
950 Platinum stamp shown with Platinum ring

Jewellery marked with a 950 stamp indicates the precious metal has a 95% purity. This number relates to both Platinum and Palladium. However, PT 950 or PLT 950 identifies Platinum. The number 950 denotes 950 parts per 1000 parts within the item. In the UK, this purity (or fineness) includes a hallmark once verified by 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.

916 Gold – What Does the 916 Hallmark Mean on Jewellery?

Jewellery Advice,

916 Gold and the 916 Hallmark in Jewellery Gold jewellery features a hallmark to denote the purity, usually 9ct or 18 carat Gold. For example, 375 and 750 appear frequently in our jewellery commissions. On occasion, we have Gold jewellery hallmarked 916. The appearance of 916 Gold sometimes causes confusion. Just like some other unusual 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.

Trillion Cut Diamonds – A Guide to Triangular Brilliance and Fire

Diamonds
Trilliant cut Trillion cut diamond

What are Trillion Cut Diamonds? The trillion-cut diamond is a triangular-shaped gemstone distinguished by its three equal sides and a facet count of either 31 or 50, determined by its purpose as a solitaire or an accent stone. Solitaire trillions exhibit a convex cut, featuring a curved profile, while accent stones showcase an uncurved or 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.