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The ancient Romans and Greeks believed that diamonds were tears cried by the gods or splinters from falling stars, and Romans believed that Cupid’s arrows were tipped with diamonds (perhaps the earliest association between diamonds and romantic love).



A carat is the name of a weight unit used for measuring diamonds and was derived from the Greek word carat - the weight of the carob tree seed. A metric ‘carat’ is defined as 200 milligrams. Small diamonds weighing less than 1 carat, are estimated in points. For example, a 0.30 carat diamond is a 30 point diamond.



A diamond’s brilliance is largely determined by its cut. An expertly-cut diamond with perfectly symmetrical and aligned facets will reflect light beautifully, leading to unrivalled brilliance. True expertise is required to create facets with perfect proportions that maximise light and increase a diamond’s signature sparkle.



White or colorless diamonds exist on a scale of many different shades, ranging from brilliant white to pale yellow. These subtle differences are graded on a color scale from D (colorless) to Z (light yellow). Beautiful colored diamonds, in hues of yellow, pink, blue, orange, green and red, for example, go beyond all other measures of rarity, and a graded based on their intensity and enticing depth of color.


Diamonds are created by tremendous heat and pressure deep within the earth. This thoroughly organic process means that virtually all diamonds contain internal inclusions and surface blemishes. Diamonds with fewer of these characteristics are deemed to have a higher clarity, ranging from FL, or Flawless, to I, signalling a number of inclusions.



At RONCHA, we apply the same high quality standards to all of our diamond shapes. We have an exceptional collection of traditional round diamonds and we also offer the finest non-round, or "fancy-shaped", diamonds available. All of our certified diamond shapes are graded by the GIA or AGSL to have FL-SI2 clarity, D-J color, and Ideal, Very Good, or Good cut. Astor by RONCHA diamonds are specifically cut to achieve unmatched sparkle and light performance that commands the attention of every eye in the room.

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