What is opal?

In short: Opal is an amorphous silica stone that stands out for its spectacular play-of-color, a shimmering rainbow effect that no other gemstone can replicate. No other gemstone looks like it. Manufacturing details reveal more about durability than the price tag. What matters is how often the piece is worn; everything else follows from that.

As of September 2026. By Phil Oberlaender, Corelune Jewellery, Düsseldorf.

Opal types and value

• Black Opal (Lightning Ridge, Australia): Most intense play-of-color, most expensive opal
• White Opal: Light background, most common type, affordable
• Boulder Opal: Opal embedded in ironstone, full of character
• Fire Opal: Vibrant orange, from Mexico, no typical play-of-color

Opal care: Special considerations

• Opal contains water (3–21%); dehydration can lead to cracking
• No ultrasound, no steam, no acids
• Wearing it on the body occasionally helps; body moisture preserves the stone

Opal jewellery at Corelune Jewellery.

Related: Opal Jewellery: Fire, Colour and Everything In Between.

Most frequently ordered items

Which material lasts best in everyday life?

How do you choose jewellery consciously?

First, clarify how often the piece will be worn. This determines how durable it needs to be.

Stick to one metal color when building a base. Gold and silver tones can be mixed, but only once the foundation is established.

It is better to have a few pieces that fit than many that are random. Five pieces in your own style will actually be used; twenty mixed ones will just be decoration in a box.

Anyone who assumes nothing wears out will be disappointed. Coatings wear off at contact points. Uncoated and solid is the more durable, albeit more color-restricted, option.

What care do jewellery pieces really need?

In jewellery, the visible loss of shine is usually caused by deposits, not wear. Drying is key: moisture in clasps and crevices is the actual problem. Nothing more is needed, and anything beyond that is more likely to harm than help.

What goes well with jewellery?

Combining works based on two rules: a common metal color and a clear difference in size. Fine chains look better in pairs than alone, while wide pieces almost always look better alone. The result should look intentional, not thrown together.

How can you tell if jewellery will last a long time?

Anyone who picks up a piece of jewellery can tell in a few seconds if it was crafted carefully. Flexibility without wobbling is the goal: parts should move easily but have no play. If in doubt, returning it within 14 days is the uncomplicated way to go.

Is the extra cost for jewellery worth it?

The range for stainless steel fashion jewellery is between fifteen and forty-five euros. For pieces under ten euros, manufacturing is usually where corners were cut. For everyday life, what counts is that you don't have to baby the piece, and that is available here at an affordable price.

When does wearing jewellery cause damage?

It is worth distinguishing between chemical and mechanical stress, as only one of these is truly critical. For glued-in stones, hot water and ultrasound are the two real risks. The point is not to be overly cautious, but to avoid those three moments with the highest risk.

What mistakes happen when buying jewellery?

Anyone who asks themselves one question before buying jewellery filters out half the bad choices: How often will I really wear this? Size specifications are skipped, material details are skimmed, and the clasp isn't even noticed. Those who base their choice on what they already wear are right significantly more often.

How durable is jewellery really?

If you want to know how long jewellery lasts, you should first ask if it has a coating. Uncoated pieces retain their appearance much longer but offer less color variety. Once you know this, you make a more appropriate material decision from the start.

What size fits for jewellery?

For jewellery, dimensions change throughout the day, which many overlook when measuring. For chains, 45 cm is the standard; for bracelets, a finger's width of space; for rings, the inner circumference in millimeters. If there is uncertainty, a 14-day return is easier than a subsequent adjustment.

Material, dimensions, and prices at a glance

Showering, swimming, and sports don't affect stainless steel; it doesn't tarnish. Values from the Corelune range for your reference.

Frequently asked questions

How do I clean stainless steel jewellery?

Mild soap, warm water, soft cloth. Anything else is risky for coated pieces.

Does stainless steel jewellery get dull or dark?

Stainless steel does not tarnish like silver and loses its coating more slowly than gold-plated brass.

Does fashion jewellery have resale value?

No. What you get is a piece for daily use, not an investment.

Concrete examples from our range: Multi-row heart chain in gold stainless steel and Shell hoop earrings in gold stainless steel. You can find more bestsellers in the category most bought items.

How do I protect jewellery from tarnishing during storage?

The right place is dry and dark; the wrong place is the bathroom.

How do I check jewellery quality without expert knowledge?

Recognizable by three details: solder joints without burrs, eyelets without gaps, and a clasp that clicks audibly.

About the author

Phil Oberlaender runs Corelune Jewellery in Düsseldorf and has worked with stainless steel jewellery daily since 2024: pattern testing, complaints, and daily wear tests. The information in this article comes from our own product range and customer feedback. Where Corelune does not offer something, it is stated as such.

Which categories are relevant to this topic?

Matching pieces:

• Tarnish-resistant jewellery

Two pieces cost 20% less, three 25%, four 30%, five 35%. Shipping is free from 59 euros. A combination of two pieces covers more occasions than a single piece.

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