The use of hard stones is very common in jewelry.

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

In jewelry, in manufacturing or in renovation, these hard stones are polished to reveal all their brilliance.

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extreme solid compounds

When stones are between 4 and 8 on the Mohs scale, EXTREM polishing compounds provide excellent polishing results at any stage.

EXTREM polishing compounds contain a unique combination of ceramic and diamond abrasives: Cerax.

This abrasive offers high quality polishing and fast performance and is particularly suitable for these delicate surfaces.

The EXTREM line includes 3 references of complementary compounds for all stages of preparation, polishing and finishing to be used with the different cotton and felt discs.

Here are our polishing recommendations for a stone with a hardness between 4 and 8 on the Mohs scale:

Preparation EXTREM S10 and disc SH, LA, STV, KH or felt

Polishing EXTREM S20 and TPB, KH or STV disc

Finishing EXTREM S30 and disc MOC2, LAG, KH or STV

EXTREM – For complex polishing


Many hard stones are used in jewelry and watchmaking.

Here are some of them :

Actinote, Agate, Aguemarine, Alexandrite, Almandine, Amblygonite, Amethyst, Anatase, Andradite, Anglesite, Apatite, Aventurine, Axinite, Barytine, Bénitoïte, Brazilianite, Cancrinite, Charoïte, Chrysocolla, Citrine, Clinozoisite, Cordierite, Carnelian, Rock crystal, Danburite, Demantoid, Disthene, Elbaite, Epidote, Goshenite, Garnet, Haüyne, Heliodore, Hematite, Hiddenite, Jade, Jasper, Kunzite, Lapis lazuli, Larimar, Malachite, Melanite, Microcline, Morganite, Tiger’s eye, Oligoclase, Onyx, Opal, Painite, Periclase, Peridot, Moonstone, Sunstone, Prehnite, Rose Quartz, Smoky Quartz, Rhodonite, Rutile, Scheelite, Serpentine, Sodalite, Spessartine, Spinel, Spodumene, Staurolite, Tanzanite, Tremolite, Topaz, Tourmaline, Turquoise, Uvarovite, Variscite, Zircon

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

Made in France