The requirements of hard stone polishing

The use of hard stones is very common in many markets such as jewelry, watchmaking, home art …

These stones, whose hardness is between 4 and 9 on the Mohs scale, are numerous and considered as minerals extracted from natural sites.

The best known are agate, aquamarine, amethyst, citrine, hematite, jade, malachite, tiger’s eye, onyx, opal, rose quartz, rhodonite, topaz, tourmaline, turquoise and zircon.

In the jewelry industry, both in manufacturing and in renovation, these hard stones are polished to reveal or recover their full brilliance.

When the stones are between 4 and 8 on the Mohs scale, EXTREM polishing compounds offer excellent results at all stages of polishing.

EXTREM polishing compounds contain a unique combination of ceramic and diamond abrasives for fast, high quality polishing, especially for hard stones.

Compound buffing mop hard stones topaz agate

aiguille-marine, topaz, turquoise or agate, each stone is unique and requires a perfect shine.

Polishing of hard stones



Polishing of very many hard stones (agate, topaz, turquoise, malachite, aquamarine) integrated in various jewelry such as rings, necklaces, brooches, bracelets, earrings...

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Art of the house, decoration

Art of the house, decoration

Polishing of very many objects for interior decoration such as sculptures, boxes, decorative objects...

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You need

tips for polishing topaz, agate, turquoise, malachite ?

Polishing tips for a hard stone, from 4 to 8 on the Mohs scale

Compound buffing mop hard stones topaz agate

Discover below a process frequently used by our jewelers customers looking for a perfect mirror polish finish on hard stones.

Recommended polishing compounds and buffing mops for polishing a hard stone from 4 to 8 on the Mohs scale

Polishing Polishing compounds Buffing mops


extrem s10
sh, la, stv, kh or felts


extrem s20
 TPB, kh or stv


extrem s30
MOC2, lag, kh or stv

You want to polish a hard stone and you need more information

on Merard polishing compounds and buffing mops?

POLISHING malachite, topaz, turquoise and other hard stones REQUIRES THE USE OF EFFICIENT POLISHING PRODUCTS.

What solutions for polishing a hard stone?

EXTREM polishing compounds and buffing mops

EXTREM polishing compounds

The EXTREM line includes highly specific abrasive polishing compounds that meet the expectations of the most demanding polishers and the most complex situations.

  • Extremely technical and precise polishing compounds, for very specific polishing problems
  • MERARD innovation: new Cerax® abrasive material, unique combination of ceramic & diamond components, implemented to meet the most difficult configurations
Polishing felts

Polishing felts

The felts are made from white virgin wool.

The polishing felts are mainly used with our pre-polishing compounds for felting operations.

They are available in 2 qualities of wools:

  • Standard

They are available in many sizes and densities.

All our polishing compounds and polishing discs are manufactured in our workshops in France

Made in France

Need more details for a specific polishing?

Contact us for more information

Discover all our recommendations by market

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