Diamonds: our selection process

Each diamond is unique, within it there are specific qualities that determine the value of each individual stone.
These are the so-called 4C, from the English Carat, Color, Clarity and Cut, respectively, carat, color, purity and cut. The international classification system uses this method to describe a diamond and determine its value.

Carat

To express the weight of the diamond, the carat is used as the unit of measurement. One carat (ct) is equal to 1/5 of a gram (0.200 grams); a 5-carat diamond, therefore, will weigh 1 gram.

Color

Many think that diamonds are only colorless stones, but in reality this is not the case. Each of them has a different shade of color given by its chemical composition. Colorless diamonds are recognized as rarer and more valuable. The international classification system orders the color and consequent quality of diamonds on a progressive scale that goes from the letter D (colorless) to the letter Z (light yellow), in which the D represents the total absence of color and therefore the diamond of greater merit.

Clarity

Purity, that is the quality of a stone to be "inclusions" free, is a further parameter for the price of a diamond. Depending on the number, color, size and position of these internal characteristics, the degree of purity of the diamond is determined according to a descending scale between I.F. (Internally Flawless - no defects visible at 10x) and the I. (Included - inclusions evident to the naked eye).

Cut

The most important feature for us is the cut, that is the process of faceting, polishing and carving of the rough stone in order to maximize the reflection and refraction of light. The secret of a diamond's beauty lies in the complex interaction between stone and light: in the way in which light meets the surface of the stone; in the quantity of it that manages to enter the diamond; and in the way in which and in what form it returns to the eyes of the observer.
The result is a magnificent display of three optical attributes: brilliance, that is the combination of reflections of white light coming from the surface and inside of a diamond; fire, a term that refers to the "flashes" of color emitted by a diamond; and the sparkle, consisting of flashes of light visible when the diamond, the light source or the observer move.

Roberto Callegari's diamonds selection process is defined by the use of gems with the following characteristics: Color (from D to G), Clarity (from VS to SI) and Cut (from Excellent to Very Good).

4Cs_image_caratweight 4Cs_image_color 4Cs_image_clarity 4Cs_image_cut

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Ruby

Always considered one of the rarest and most precious stones in the world, the ruby ​​is second only to the diamond.

From the Latin “rebeus”, red, this stone is a variety of corundum, an aluminum oxide mineral characterized by its lively and brilliant red color.

Since ancient times, ruby ​​has been considered one of the favorite precious stones of nobles and sovereigns, especially in India and Asia. This stone is associated with births in the month of July, known in India as "ratnaraj", "King of precious gems" and symbolizes love and passion.

In nature it is possible to find rubies of various shapes, prismatic, bipyramidal or rhombohedral, but it is the luster, the brilliance and the cut that give character to this unique stone. In order to better observe the ruby ​​and discover its nuances, it is recommended to expose the precious gem to white or natural light.

The best known deposits are in Madagascar, China, Sri Lanka, Tanzania and Vietnam, but the most precious and sought after are those located in the Mogok valley, in Burma, from which the most precious rubies come from and with a greater intensity. of color.

According to some popular beliefs, the ruby ​​was an amulet able to protect those who owned it from ills and misfortune but also to give longevity.

Today it is a stone symbol of beauty, power and sunshine and its being rare makes it even more special.

23 June 2022

The Emerald

One of the gems that has most characterized the tradition and design of Roberto Callegari's creations is certainly the emerald.

The name of this magnificent stone comes from the greek smaragdos which means “green gem”. In ancient times, all green colored gems were called emeralds and it is only in more modern times, with the progress of analysis, that it was possible to distinguish the various species.

Emerald is part of the beryl mineral family, also known as "the mother of gems" due to its highly prized varieties. It owes its color to chromium, vanadium and iron, the various concentrations of which result in an extraordinary range of greens. According to experts, the most precious emerald shade is the one that combines an intense green with the highest transparency.

"There is really no other stone whose color gives joy and refreshment to the eye like this one, since there is no more intense green than its color".

Plinio il Vecchio - Naturalis Historia

The main fields are found in Colombia, Zambia, Brazil, Zimbabwe.

This stone is traditionally linked to prosperity, youth and immortality and is the birthstone of May. The vibrant intensity of its color together with the positive symbolism that characterizes it, have made the emerald a source of inspiration and magical beauty.

Emeralds, like all gems, have numerous internal characteristics. These peculiarities represent the details of their history, as rare as the material from which they derive. Each stone, like every jewel, is a unique creation that comes to life not only thanks to nature, but also through the gem cutter who shaped it, the jeweler who gave it new shape and the setter who made it possible.

A wonderful story hidden in every little detail.

25 February 2022

The Flamingo

The symbol chosen for many years as a witness to our heritage is the flamingo. A meaningful figure that has represented positivity, elegance and love since ancient times. Fundamental values that have always been dear to our family and which we wish to communicate to those around us.

This particular animal, thanks to its dynamism and the peculiarities that distinguish its habitat, migration, nourishment and habits, is often associated with the four elements: water, air, fire and earth. It is present in Egyptian culture as an animal sacred to Ra, the God of the sun. In Hinduism it is the one who knows the worlds of light. Many other cultures have made the flamingo the symbol of balance and harmony. More than a simple figure, an icon that tells the passion and tradition that lies behind Roberto Callegari.

In 2021, with the restyling of our logo, the flamingo has reborn through a simple and refined change characterized by delicate and elegant lines.

The Flamingo. A symbol, our history.

30 November 2021

Octagon Ring

In 1989 Roberto Callegari created a handcrafted rose gold ring with a magnificent 8 ct antique cut diamond. A unique jewel that combines tradition and innovation by referring to the figure of the octagon.

In the East, specifically in China; the octagon represents one of the greatest known symbols of the Taoist current. This symbol is called Bagua or Pakua. The meaning of bagua (ba gua) is eight numbers. They can be considered symbolic representations of the family units. They represent in fact father, mother and the various degrees of the children, both females and males. It is from this meaning that the Octagon ring is born, a creation that refers to the family and to the importance of bonds with the people we love.

This geometric elegance inspired the new collection that celebrates our 110 years. Elisabetta, Andrea and Beppe, the third generation at the helm of the family business, have reinterpreted the Octagon ring through the use of innovative materials by combining titanium with pink gold. The contrast between the use of these materials and the uniqueness of the stones makes the octagon ring a symbol of history, passion and craftsmanship.

21 September 2021