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Jewellery Care and FAQs

Ring Sizes

Ladies Ring Size Chart
US (DPI Size Ref) Aust/UK Diameter (MM)
5 J 1/2 15.7
6 L 1/2 16.5
7 N 1/2 17.3
8 P 1/2 18.2
9 R 1/2 19.0
10 T 1/2 19.8

Mens Ring Size Chart
US (DPI Size Ref) Aust/UK Diameter (MM)
8 P 1/2 18.2
9 R 1/2 19.0
9.5 S 1/2 19.4
10 T 1/2 19.8
10.5 U 1/2 20.2
11 V 1/2 20.6
11.5 W 1/2 21.0
12 X 1/2 21.4
12.5 Y 1/2 21.8
13 Z 3/4 22.2
14 Z3 23.0
15 Z5 23.8


G: Gold Plate
RG: Rose Gold Plate
BP: Black Pearl
CN: Carnelian
MOP: White Pearl
ON: Black Onyx
TQ: Blue Turquoise
WQ: White Quartz
MOON: Moonstone
AM: Amethyst/Purple
CZBT: Blue Topaz/Blue CZ
CZ: Clear CZ
GAR: Garnet/Red CZ
PCZ: Pink CZ
PER: Peridot/Green CZ
SAP: Dark Blue CZ
MTPZ: Mystic Topaz
RQ: Rosw Quartz
LAB: Labrodorite

Jewellery Care Instructions


The official designation of “Sterling” to a piece of Silver indicates that it contains at least 92.5% of pure Silver. The remaining 7.5% comprises of other metal alloys, most commonly copper. Although it may seem that “pure” Silver would be most desirable, that’s not actually the case. Metal alloys with a Silver content of more than 92.5% are too pliable to be used without suffering from dents and damage. The second alloy is required to ensure the metal’s stability and resilience.


Sterling Silver will tarnish. This is not a defect but the result of a natural chemical process that occurs when Sterling Silver is exposed to materials containing sulphur and acids (such as those found in sweat and skin oils).

Anything, from medication, perfume or the ph balance of a person’s skin, can affect the extent of tarnishing to a piece of jewellery. Humid environments will also accelerate tarnishing. It is important to clean and care for your jewellery regularly to prevent any tarnish or discolouration from occurring.


DPI Jewellery uses a combination of Nano and E-Coat technologies to help protect our Sterling Silver jewellery from tarnishing. Reducing the need for hand polishing, they also eliminate discolouration caused by natural and display lighting, protecting the jewellery during fittings and long-term wear. These highly efficient processes decrease customer returns and increase the value and longevity of our Sterling Silver jewellery pieces.


There are several ways you can clean and maintain your Jewellery items. At DPI we recommend the WKM cleaning product range (Refer to our D&P section). This fantastic proven product includes specially formulated liquid dips and polishing cloths for both Sterling Silver and other precious metals. These are highly effective in removing tarnish and surface dirt from your jewellery, bringing it back to life.

Plating is a process where a layer of gold is placed on to coat the surface of another metal. As the jewellery is not 100% solid gold, extra care should be taken to maximise its life span. Please avoid contact with perfumes, chemicals and water environments to avoid colour fading and wear.

Please note - different types of jewellery should be cleaned using different methods. Please follow the specific instructions for best results using WKM products or contact any of our friendly staff for further advice.



When it comes to Sterling Silver jewellery it is always best to avoid wearing it in water, in particular swimming pools and spas, as chlorine can damage your jewellery in a very short time. This is most important with regards to stone sets and in particular crystal set jewellery. All of our crystal pieces are set in specialised glue that does not react well with water or everyday “chemicals” such as shampoos or perfume. It is important to explain to your customers that these specialised pieces are best for occasional wear and will need to be treated with care to ensure their lustre and longevity.


Allure is our fashion jewellery range, made of a mixture of base metals excluding lead, nickel and cadmium. The same care tips apply as with our Sterling Silver jewellery, avoiding contact with any water, perfumes, and household cleaning products. The plating on Allure fashion jewellery can reduce in colour over time and these pieces are for occasional wear, to best preserve their look and the materials that they are made from. These pieces are fashion jewellery, not sterling silver, and will require care to keep them in their original condition as they are unable to be cleaned with jewellery polishing cloths or jewellery liquid dips.

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(03) 9894 7891
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