Gemstone Basics
Let's begin by understanding what gemstones are and taking a look at their geological origins:
What Exactly Are Gemstones?
Gemstones are naturally occurring minerals or rocks that have been cut, polished, and crafted into exquisite pieces of jewellery and decorative items. Humans have been captivated by their aesthetics, scarcity, and intrinsic value for centuries. Each gemstone boasts a palette of colours that holds its irresistible charm. Moreover, these treasures have been cherished throughout history for their significance, metaphysical properties and healing abilities.
The Science Behind Natural Gemstones
Natural gemstones, also known as organic gemstones, embody a captivating blend of geology, chemistry, and physics. These extraordinary minerals are formed within the Earth's crust, where they crystallise under immense heat and pressure, taking thousands or even millions of years under intense heat and pressure. Gemstones possess captivating colours and remarkable transparency due to the exceptionally rare mineral transformation they undergo.
The chemical composition of gemstones is incredibly diverse, with each type possessing its own unique mineral structure. For instance, diamonds consist of carbon atoms arranged in a crystalline lattice, while rubies and sapphires are variations of the mineral corundum coloured by trace elements such as chromium and iron. When light interacts with these minerals, fascinating optical effects like refraction, dispersion and reflection occur, producing the mesmerising optical effects that make natural gemstones alluring.
Types of Gemstones
Gemstones come in the form of precious stones and extremely rare semi-precious stones, popular especially with jewellery making. In this list, you'll discover an array of gemstone varieties.
Precious Gemstones
There are four types of stones in the world classified as precious gemstones
Diamond
Known as the "King of Gemstones," diamonds are renowned for their brilliance and durability. These dazzling gems form far into the Earth's mantle and are often used to create stunning engagement rings and other high-end jewellery pieces.
Blue Sapphire
The allure of sapphires has captivated generations with their deep blue shades. These valuable gemstones are a symbol of wisdom and add a touch of sophistication to any piece of jewellery. One of the most famous pieces, the "Hope Sapphire," is a sapphire known for its intriguing history.
Red Ruby
Rubies are connected with passion and love. These vibrant gemstones are highly valued for their intense shades of red, vibrant colour and exceptional hardness. Throughout history, rubies have adorned the crowns of Kings and Emperors, symbolising power and wealth.
Green Emerald
Emeralds are a green gem admired for their rich hue, which signifies renewal and growth. These precious green gemstones have a standing tradition of adorning royal jewellery, including Queen Mary's legendary emerald and diamond tiara.
Semi-Precious Gemstones
Semi-precious gemstones possess their own distinct beauty and allure, setting them apart from their rarer and more valuable counterparts
Topaz
Topaz occurs naturally in colours, with blue topaz being particularly popular. These gemstones are renowned for their brilliance and versatility, making them a favoured choice among jewellery enthusiasts.
Garnet
Garnets exist in an array of colours; however, deep red garnets enjoy the fame. These gems are believed to symbolize protection and strength, making them widely embraced in both traditional and contemporary jewellery-making designs.
Rhodalite
Rhodalite garnets are a type of garnet renowned for their captivating pink shade. These gemstones are highly valued for their colour and are frequently utilised in one-of-a-kind and visually appealing pieces of jewellery.
Moonstone
Moonstones are adored for their mesmerising display of colours resembling the tranquil glow of the moon. These gemstones have associations with intuition and love and are often used in bohemian-style jewellery.
Hematite
Hematite is a gemstone recognised for its reflective surface and grounding properties. It is often used in unisex jewellery designs, adding an edgy and contemporary flair.
Onyx
Onyx is a gemstone that emanates elegance and mystery. It is commonly featured in men's jewellery to provide a stark contrast in black and white arrangements.
Amethyst
Amethysts are a purple gem variety made of quartz. They are highly prized for their deep purple hue, often associated with tranquillity and spiritual growth. These gems find their place in various styles of jewellery, ranging from classic to modern.
Citrine
The yellow-orange tones of Citrine are reminiscent of sunshine. Believed to bring positivity and abundance, these gemstones enjoy popularity when it comes to creating jewellery pieces.
Tourmaline
Tourmalines come in an array of colours, making them versatile gems for designers. Gem enthusiasts appreciate the distinctive colour combinations that these stones possess.
Cubic Zirconia
Although not naturally occurring, cubic zirconia has become a favoured alternative to diamonds. It showcases a sparkle at an affordable price point, making it accessible to a wide range of individuals.
High-Value Semi-Precious Stones
These stones are rare and exceptionally valuable varieties of semi-precious gemstones
Pink Sapphire
Pink sapphires display a romantic hue. Their rarity, appearance and desirable gemstone colour contribute to their value in the world of fine jewellery.
Tanzanite
Tanzanite's striking violet-blue colour is truly captivating. These gems are exclusively found in Tanzania and are highly priced due to their value and limited availability.
Opal
Though they are thought of as white gemstones, Opals are renowned for their iridescent play of colours, which can resemble a kaleidoscope of hues. Their unique beauty makes them treasured gemstones often used in customised creations.
Popular Gemstone Cuts and Shapes
From colour and clarity to carat weight and cut, each aspect plays a crucial role in determining the gemstone's appearance and suitability for your unique preferences and jewellery designs
The Art of Gemstone Cutting: Exploring Different Cuts
The cut of a gemstone plays a crucial role in enhancing the gemstone's appearance, brilliance and beauty. Different cuts are chosen to highlight the characteristics of each gemstone. Below are ten popular gem-stone cuts that you should know:
Round Cut: This timeless cut is renowned for its sparkle and fire. It maximizes the brilliance of a gem and is commonly used for diamonds. However, it can also work well for other gemstones, especially those with good clarity.
Princess Cut: Square or rectangular in shape, the princess cut is famous for its sharp corners and brilliance. It's a popular choice for diamonds and sapphires.
Emerald Cut: This rectangular cut features step-like facets that create a mesmerizing hall-of-mirrors effect. It's a good choice for emphasising a gemstone's clarity and is often used for emeralds and diamonds.
Oval Cut: Oval-shaped gems offer an elongated and elegant appearance. This particular cut combines the brilliance of a round cut with a shape, making it versatile for various types of gemstones.
Pear Cut (Teardrop): The pear cut is designed to resemble a tear shape, bringing together the round and marquise shapes. It's used to showcase a gemstone's symmetry and can make fingers appear longer when used in rings.
Marquise Cut: With its elongated, football-like shape, the marquise cut highlights a gemstone's size and carat weight. It's known for its distinctive, elegant appearance.
Cushion Cut: This cut has rounded corners and larger facets, producing a softer, romantic look. It is often favoured for coloured gemstones like sapphires and rubies.
Asscher Cut: Similar to an emerald cut but square, the Asscher cut boasts exceptional clarity and step-cut facets. It's a popular choice for vintage-style jewellery.
Radiant Cut:Combining brilliant cut facets with trimmed corners, the radiant cut serves as a hybrid between the emerald cuts. Its versatility allows it to showcase the colour of a gem beautifully.
Cabochon Cut: Unlike faceted cuts, cabochons are smooth and domed, with no facets. This cut is commonly used for opaque gems like opal and turquoise, emphasizing their unique colours and patterns.
