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In the past, a dissimilarity was often made between semi-precious stones and precious stones. In the meantime, this distinction is no longer made. They are usually grouped under the term gemstones, but are divided into hard or soft gemstones. So there are soft gemstones that are particularly sensitive and hard gemstones that are significantly more robust.
Cleaning soft gemstones : With soft gemstones, you should in
principle keep your hands off hot water and cleaning agents. They are really
sensitive and can even be damaged by normal soap. The best way to clean it is
with a very soft toothbrush and lukewarm water. Then dry the jewelry with a
soft cloth.

Soft gemstones are
for example: amber, opal, moonstone, turquoise, coral, lapis lazuli and many
more.
Not always, but often the stones that used to be called semi-precious stones are soft gemstones. So this can already be an indication of how the gem should be cleaned. If in doubt, it is worth taking a look at the so-called Mohs hardness of the stone. A value below 7 is considered soft. The higher values up to 10 are considered hard. The hardest mineral is diamond with a Mohs hardness of 10.
Cleaning hard gemstones: More robust, hard gemstones can be
placed in lukewarm water with a little mild detergent for a few minutes. Gaps
in the socket can be carefully cleaned with a toothbrush with soft bristles.
The piece of jewelery is then rinsed off with lukewarm water, dried with a soft
cloth and then polished up.
Hard gemstones are for example: diamond, sapphire, ruby,
aquamarine, topaz, rose quartz, amethyst and many more.
Tip: If you are unsure, treat every gemstone like a soft
gemstone. So just use lukewarm water and a very soft toothbrush for cleaning.
Most of the time, this method is sufficient. Only when you have tried to clean
your jewelry this way and have failed should you consider special cleaners.
Clean pearl jewelry
Pearls or mother-of-pearl are also among the delicate pieces
of jewelry. In addition, their surface is sensitive to acids, so that sweat
lying on the skin attacks the jewelry in the long term. Pearls are also
sensitive to moisture. If they are not moist enough, cracks appear; if they are
too moist, they swell and lose their shape.
So the best tip for cleaning is actually prevention. Pearls
should not be worn at all at the hairdresser's or on hot days when you spend a
lot of time in the sun. Pearl jewelry should also be removed when showering or
bathing. Pearls must also never come into contact with chlorine or salt water.
However, pearl jewelry should still be worn regularly so
that the pearls are supplied with sufficient humidity. Then the jewelry should
be stored separately from other jewelry on a soft surface.
The best way to clean pearl jewelry is with a soft cloth.
Polish the pearls with a dry, soft microfiber cloth. For most pollution this is
perfectly sufficient. If you can't avoid wet cleaning, you should use clear
water and then let the pearls dry on a towel. Otherwise the pearl silk can tear
when wet.
Professional jewelry cleaning
Professional cleaning is often recommended for particularly
high-quality jewelry. So you can be sure that the jewelry will not be damaged
and will look like new again afterwards. Jewelers and many opticians offer
professional jewelry cleaning at a low price.
In the case of heavily soiled or scratched jewelry, you can
also consider reprocessing it at the jewelry store. It is best to call the
jeweler you trust and get advice.
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