Jewellery and watch guide by Juwelier Cermak in Linz

Jewelry & Watches Guide

Here you will find answers to questions that we are asked particularly often in our store on Landstraße 91 in Linz. If your question is not among them, we will be happy to advise you personally.

As of: October 2026

Rings & Gold

How do I find my ring size?

We measure your ring size most accurately directly in the store. Alternatively, you can bring a well-fitting ring that you wear on the same finger. Good to know: Fingers are usually slightly thicker in the heat and in the evening than in the morning or in the cold.

What do 333, 585 and 750 mean in gold?

The number indicates the gold content in thousandths: 750 gold contains 75 percent fine gold (18 karat) and has the most intense color. 585 gold contains 58.5 percent (14 karat) and is slightly harder, making it robust for everyday wear and the proven classic, also for wedding rings. 333 gold contains 33.3 percent (8 karat) and is the most affordable option.

If a ring no longer fits: We explain resizing in the Jewelry Workshop. If it is already tight and can no longer be removed, our page Ring stuck – Immediate help & ring opening will help.

Wedding Rings

On which hand is the wedding ring worn?

In Austria, the wedding ring is traditionally worn on the ring finger of the right hand, in many other countries on the left. Ultimately, you decide on which hand your ring feels best.

Yellow gold, white gold, rose gold or two-tone?

Yellow gold looks warm and classic, white gold cool and modern, rose gold soft and romantic. Two-tone rings combine two gold colors in one ring. It is best to try the colors on your own hand.

What ring width is comfortable?

Most wedding rings are between 3 and 6 millimeters wide. Narrow rings look delicate, wider ones more substantial. How a width feels in everyday wear, you will notice best when trying it on.

What does the profile of a ring mean?

The profile describes the shape of the ring in cross-section, for example flat, slightly or strongly curved. Rounded rings on the inside glide more easily over the finger knuckle and are often perceived as particularly comfortable.

Polished or satin-finished?

Polished rings shine brightly, but show fine scratches more quickly. Satin-finished, i.e., matte surfaces, look more subtle and make signs of wear less noticeable. Both surfaces can be refreshed if necessary.

Do both rings have to look the same?

No. Many couples choose the same gold color and surface and differentiate the rings in width or stone setting, for example with a brilliant-cut diamond in the women's ring.

Is a diamond in a wedding ring suitable for everyday wear?

Yes. Diamonds are the hardest gemstones. In wedding rings, they are usually set flush or slightly recessed, thus they are well protected and hardly catch on anything.

How do I wear an engagement ring and a wedding ring together?

Many wear the engagement ring together with the wedding ring on the same finger after the wedding. So that both lie well together, it is worth trying them on together when choosing. Alternatively, the engagement ring is moved to the other hand.

Does white gold need to be treated afterwards?

White gold is usually rhodium-plated so that it shines particularly bright. This layer can wear off over the years and can then be renewed, so that the ring shines brightly again.

You can find the timeline and engraving under Engagement & Wedding, delivery time and approximate prices for our Wedding Rings.

Gemstones & Diamonds

Which gemstones are suitable for everyday wear?

Hardness is especially important. Diamonds are the hardest gemstones, sapphires and rubies are also very resistant and therefore ideal for rings that are worn every day. Topaz, aquamarine or peridot are slightly more sensitive. Pearls, opals and turquoise should be protected from impacts, cosmetics and moisture and are particularly suitable for earrings and necklaces.

What does karat mean for gemstones?

For gemstones, karat is a unit of weight: One karat corresponds to 0.2 grams. This is not to be confused with karat for gold, which indicates the gold content.

What are the 4 Cs for diamonds?

The quality of a diamond is judged by four characteristics: Carat (weight), Color (color), Clarity (purity) and Cut (cut). Above all, the cut determines how strongly a diamond sparkles. We are happy to explain the differences to you directly on the stone – in detail and with interactive illustrations also in our Diamond Guide.

How do I care for jewelry with gemstones?

Most gemstones can be gently cleaned with water and a little soap – it is also important to clean the back, so that a lot of light falls into the stone again. Sensitive stones such as emeralds, opals or pearls should not be cleaned in an ultrasonic bath. We are happy to offer you a thorough professional cleaning.

Everything about cut, color, purity and karat – with interactive illustrations – can be found in our Diamond Guide.

Watch Straps

Which watch strap suits me?

Leather straps look classic and are comfortable to wear, but do not like water. Metal straps made of stainless steel are robust and suitable for everyday wear. Milanaise straps are finely woven and can usually be adjusted continuously. Plastic and silicone straps are well suited for sports and water.

What strap width does my watch need?

The strap width corresponds to the distance between the two strap lugs on the case and is given in millimeters. Simply bring your watch by, we will measure it and show you suitable straps.

When should a leather strap be replaced?

If the leather is cracked, brittle or heavily discolored or no longer smells good, it is time for a new strap. We replace leather and metal straps and are happy to advise you on the selection.

Which watch movement suits you, we explain on the Watches page, battery replacement and strap shortening in the Watch Workshop.

Jewelry Care

How do I care for my jewelry?

Clean gold and silver jewelry occasionally with lukewarm water, mild soap and a soft brush. Take off jewelry when exercising, gardening, or handling cleaning agents or chlorinated water, and keep the pieces separate from each other so that they do not get scratched. We are happy to offer you a professional cleaning and polishing.

Necklace lengths and the care of pearls can be found under Necklaces.