All SVEN-HOLGER jewellery pieces are crafted by masters, carefully selected and inspected to adhere to high standards of quality.
Natural raw materials
We guarantee our customers quality products, together with personal and professional service. To keep your jewellery in optimum condition for future generations, please follow the care recommendations below.
Metal density, hardness and weight
The difference between metals of different purity and types is not just the difference in colour – which can be quite subtle – but also differences of density, hardness and weight.
Various other pure metals are added to gold and silver, which are relatively soft in their pure state, to increase durability and strength. This is what the carat (ct) or Karat (K) mark indicates.
For example if you have silver that is 92.5% pure, it is marked 925. Other metals make up the balance.
Gold that is 37.5% pure would be marked 375, with other metals making up the balance.
- White metals: the hardest metal is platinum. It is followed by white gold (18ct), palladium, white gold (14ct) and white gold (9ct).
- Yellow gold: the hardest is 14ct yellow gold, which is harder than both 9ct and 18ct, which are typically equally soft.
The best known gold alloy is yellow gold (widely used in wedding rings, for example). The gold content in the alloy is reflected in its appearance, from pale yellow (lowest) to saturated yellow colour (highest). This is achieved by varying the amounts of added copper and silver.
There are coloured gold variants, such as rose gold. This is made possible by increasing the amount of copper in the silver/copper mixture.
- Rose gold: the hardest is 18ct, followed by 9ct, which is harder than 14ct.
Metals and their weights
All weight values are approximate values in g/cm3
9ct Yellow Gold
9ct Rose Gold
9ct White Gold
14ct Yellow Gold
14ct Rose Gold
14ct White Gold
18ct Yellow Gold
18ct Rose Gold
18ct White Gold
22ct Yellow Gold
Jewellery made of precious metal will get scratched and worn over time.
Please do not wear jewellery while doing domestic or manual work or when participating in sports or exercise, since the risk of damage would be quite high in those situations
We recommend that you store your jewellery in a safe place when not wearing it. For your security, please do not keep your jewellery – especially diamond jewellery – on open show in the house.
Store your jewels separately, because diamonds and hard metals could scratch each other.
Chemicals and jewellery
Bleach and cleaning products, as well as deodorants, perfumes and hair spray, should not come into contact with your jewellery. Remember that narcotics, alcohol, pharmaceuticals and some foods can adversely affect the pH balance in your skin. It is known that the tarnishing process of sterling silver, for example, can be accelerated as a result.
We also recommend that you not remove your jewellery when visiting public conveniences.
Wearing jewellery when swimming in chlorinated water or seawater
Please do not wear jewellery when swimming in swimming pools or in the sea.
Both the chlorine in swimming pools and the salt in the sea cause deposits as well as ongoing surface damage and can lead to dulling and tarnishing of your jewellery.
Clean-up, inspection or repair?
We are always happy for you contact us to have your jewellery inspected, professionally repaired, cleaned and/or polished.
We recommend polishing every second year.
Your personalised cufflinks
Please contact us with any individual wishes for a special metal, logo engraving, company incentive or anniversary, or as a special award for winning a race.
We will be happy to advise you based on your requirements.
Sterling silver jewellery - special treatment
From time to time, depending on usage, we recommend using a silver polishing cloth made of cotton (impregnated with silver cleaner and anti-tarnish agent) to polish your jewellery by hand.
The sulphur in our air causes sterling silver to oxidise and tarnish over time if not used.
Gold, platinum and palladium jewellery
Clean the jewellery from time to time with a cotton swab or a toothbrush, using soap and warm water from time to time.
Please contact our Customer Support