Gemstone Guide



While the diamond remains the most popular gemstone in engagement rings, many girls also opt for other precious stones to signify the beginning of their new journey.

Gemstones which are highly valuable for their hardness and rarity are known as Precious Stones. Precious Stones are generally expensive in comparison to Semi-Precious Stones.

These are four of the most popular Precious Stones:


A perfect example of the contradictions of nature, diamond is the hardest natural mineral known to exist.
[read more=”Read More” less=”Read Less”]Coming from the Greek word adamas, meaning “unbreakable”, the diamond is billions of years old. After mining, the rough diamonds are cut, polished and graded into jewellery grade stones. Known in the trade as “The Four C’s”, carat weight,cut, colour and clarity are the measures used to determine the value of a diamond. While carat weight, or the actual size, of the diamond is often considered the most important by the buyer, at Affinity Diamonds we aim to educate you on the importance of balancing all four aspects, so that your diamond is as beautiful as possible.
While colourless, or “white” diamonds are prized for their clarity, beauty and purity, diamonds can be found in a full spectrum of colours. These range from chic and elegant yellow and cognac tones, through oranges, flirty and precious pink diamonds to the rarest blue and red stones, of which only a few true examples have ever been discovered.[/read]


Ruby is the red variety of the mineral corundum, one of the hardest minerals on Earth, of which the sapphire is also a variety.

[read more=”Read More” less=”Read Less”]The red color of ruby results from a small admixture of chromic oxide. Only red corundum is entitled to be called ruby, all other colors being classified as sapphires. In Sanskrit, the ruby is called ‘Ratnaraj’, means ‘the king of precious stones’. For thousands of years, the ruby has been considered one of the most valuable gemstones on Earth. It has everything a precious stone should have: magnificent color, excellent hardness and outstanding brilliance. In addition to that, it is an extremely rare gemstone, especially in its finer qualities. The ruby is considered as an excellent choice for the jewellery. Beyond its incomparably rich red hue, which alone might be enough attraction, the ruby is second only to the diamond for strength and durability.[/read]


Sapphire is also a variety of the mineral Corundum and represents all the colors except red Corundum, which is Ruby.

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Blue is the main color of the Sapphire whereas this gemstone is also found in colors like green, orange, pink, gray, colorless, black, brown, and purple. Sapphire is the most precious blue gemstone. It is a most desirable gem due to its color, hardness, durability, and luster. Top-quality sapphires are extremely rare in all the gemstone mines of the world. Cutting of this gemstone requires great skills and experience and it is the job of the cutter to orientate the raw crystals in such a way that the color is brought out to its best improvement.

The Sapphire is also considered as an excellent choice for jewellery. In terms of hardness and durability, it is second only to the diamond (and equal to the ruby). It can be worn everyday without the caution needed with more fragile gemstones like the opal or topaz.



Emerald is one of the most fascinating and beautiful gemstones.

[read more=”Read More” less=”Read Less”]The name of this remarkable gemstone comes from the Greek word ‘Smaragdos’, meaning ‘Green Stone’. Its beautiful green colour, combined with durability and rarity, makes it one of the most valuable gemstones. Deep green is the most desired colour in Emeralds. Although Emeralds are notorious for their flaws they have been considered as high esteem gems since ancient times. Flawless stones are very uncommon, and are noted for their great value, sometimes even more than diamonds. Its good hardness protects the stone to a large extent from scratches but it may develop internal cracks if knocked hard or if exposed to extreme temperature.[/read]

Semi Precious Stones


Amethyst is a variety of the Quartz family, coloured by traces of manganese, titanium and iron.

[read more=”Read More” less=”Read Less”] Deeper-coloured amethysts are more highly valued. Rich purple has always been a rare and noble colour. This brilliantly sparkling stone is the most valued gemstone from the quartz family.[/read]


This is a fascinatingly beautiful gemstone found in colours like light blue of the sky to the deep blue of the sea.

[read more=”Read More” less=”Read Less”]The more intense the colour of an Aquamarine, the more value is put on it. Aquamarine is one of the most popular and best-known gemstones. There is hardly any other gemstone in modern jewellery design which is refined in such a variety of ways as Aquamarine.[/read]


A Pearl is an organic gem, produced when certain mollusks, primarily oysters cover a foreign object with beautiful layers of nacre.

[read more=”Read More” less=”Read Less”] A good-sized Pearl can take between five to eight years to form, which is usually the entire life of the oyster or mollusk.
There are two types of Pearls: Natural Pearls, formed inside wild oysters, practically impossible to find nowadays, and Cultured Pearls in which the production of the pearl is artificially induced.


Tourmalines are gemstones with deep brilliance and incomparable variety of colours.

[read more=”Read More” less=”Read Less”]These Gemstones are mixed crystals of aluminium boron silicate with a complex and changing composition.
The name tourmaline comes from the Singhalese words ‘tura mali’, means something like ‘stone with mixed colours’. Tourmalines with different colours have different names. Stones with two colours are known as bicolored tourmalines, and those with more than two are known as multi-coloured tourmalines.