Where should I get the highest quality gemstones

HC Arnoldi Gem Lapidaries

The production of the precious stones

The creation of all color stone minerals, every single crystal, is always a miracle of nature and tells of the history of its creation in a time without people.

We accompany the stones with the greatest care directly from the source, the mines, through purchase, appraisal, cutting, ebouching, grinding and polishing to sale throughout Europe, Asia and the United States of America.

With our team of more than 15 highly qualified, trained employees, we accomplish what nature has created over millions of years. Each stone is examined individually and ground in filigree manual work to achieve the best possible result. We attach particular importance to the highest quality craftsmanship in the processing of the gemstones and check them through demanding quality controls by our clerks.

PURCHASING THE RAW STONES

We receive our rough stones from suppliers all over the world and examine them for color, defects, cracks and general quality, among other things.

We investigate which shapes we could carve out of the stones, how much the material is worth and then enter into a price negotiation. We pay particular attention to fair conditions for everyone involved.

APPRAISAL & EXPERTISE

After the purchase, every single stone is expertly examined and appraised again in our workshop in Kirschweiler near Idar-Oberstein.

This is where the first decisions are made as to which cuts should be used in order to extract the optimal values ​​from the individual stones.

The first cut

Depending on the type of stone, different axes are selected and the first cut is made with a diamond saw in order to achieve the optimal color expression of the stone in the later end result.

E-BOOKING THE STONES

The stone receives its first basic shape from the gemstone designer by ebouching. Hubert Arnoldi is usually personally responsible for this, since as little material as possible should be lost when registering.

The ebouched basic shape is perfected in the following steps.


Ebouched, unpolished rough stones before fine-tuning

KITTEN THE STONES ON THE MUTTING STICK

In the gemstone cutting shop, the individual stones are attached to a so-called putty stick.

The stone can thus be handled more easily for the next steps and can later be removed from the putty stick without leaving any residue. The stones are repackaged several times for the different work steps.

THE PERFECT FACETED EDGE

In traditional and professional manual work, the fine facets of the stone are now repeatedly ground on the diamond whetstone from different sides.

The putty stick is placed on a perforated board in order to guarantee a constant angle and consistently high precision of the cut.

FINAL POLISHING OF THE GEMS

The facets of the stone are then polished to perfection.

In order to avoid streaks, a very well trained eye is required to bring out the optimal shine of the gemstone. Finally, the gemstone is removed from the putty by cooling and then placed in an essence to remove the remaining putty residue.

Finished stones, polished to a high gloss


TECHNOLOGY-ASSISTED SQUARE SANDING

In the case of serial production, in which the precisely calibrated dimensions of the colored stones are important, the grinding process is carried out on the quadrant with the aid of technology.

The traditional perforated board is replaced by a mechanical wheel on which the angle for grinding the gemstones can be precisely set with a digital display. Instead of the putty, a UV adhesive is used, which is fixed and cured under UV light.

GRINDING VARIANT - THE CABOCHON GRIND

With the cabochon cut, the gemstone is not provided with facets but cut into a round or oval, outwardly curved shape.

The cabochon cut, named after the French cabochon for "nail head", is often used for opals or cat-eye quartz, for example, in order to bring out the natural shimmer of the stones in the best possible way.