Opals
Opals are unique gemstones known for their vibrant
play-of-colour, where flashes of rainbow hues shift as the stone is moved. They
form over millions of years when silica-rich water seeps into cracks and
cavities in rock. As the water slowly evaporates, it leaves behind tiny silica
spheres that stack in an orderly pattern. This structure diffracts light,
creating the opal’s characteristic colours. Opals are most commonly found in
dry, desert-like regions where this process can occur undisturbed for long periods.
The world’s largest and most famous deposits are in Australia, particularly in areas like Lightning
Ridge, Coober Pedy, and Andamooka, but they can also be found in countries such
as Ethiopia, Mexico, and Brazil. Each opal has
its own personality and colour pallete that makes it more like looking at a
painting rather than a gemstone. They are great to pair with vibrant colours to
accent their “flashes” that always makes them come to life and dance.
Laboratory Grown Diamonds Verses Natural Diamonds
Lab-grown diamonds are a synthetic diamond that are produced in controlled laboratory
environments rather than formed naturally within the Earth. They have the same
chemical composition (carbon), crystal structure, and physical properties as
natural diamonds, including their hardness and optical qualities. These
diamonds are created using advanced methods such as High-Pressure High
Temperature (HPHT), which replicates the conditions deep underground, or
Chemical Vapour Deposition (CVD), where carbon atoms are gradually deposited to
form a crystal.
Lab-grown diamonds are typically more cost-effective than
mined diamonds and can offer environmental advantages, as their production does
not involve large-scale extraction. Despite their different origins, they are
visually and structurally identical to natural diamonds and can only be
distinguished by professionals. Value is considerably different between the 2
types. Lab grown are inexpensive and
produced on a mass scale which holds very little value. Natural Diamonds formed
by mother earth have an intrinsic value that throughout time man always values.
They are considered more valuable and can be insured
The Four C's
The 4 C’s are cut, colour, clarity, and carat weight, are an
internationally recognised standard for evaluating diamonds. They were
developed by the Gemological Institute of America
(GIA) to create a consistent and reliable system for grading diamond quality.
Today, this system is used worldwide by jewellers, gemologists, and buyers to
compare and assess diamonds with accuracy and confidence.
Cut
Cut refers to how well a diamond has been shaped and faceted. It is the most
important factor in determining a diamond’s sparkle, as it affects how light
enters reflects and refracts within the stone. A well-cut diamond will appear
bright and brilliant with scintillation. While a poorly cut one may look dull,
lifeless and have dark areas inside the stone.
Colour
Colour measures how colourless a diamond is. Diamonds are graded on a scale,
with the most valuable stones having little to no colour. The closer a diamond
is to being completely colourless, the higher its quality and value.
Clarity
Clarity assesses the presence of internal inclusions and external blemishes. Inclusions
are Diamonds with fewer imperfections are considered more valuable. Most
inclusions are not visible to the naked eye, but they can affect the overall
quality of the stone. Inclusions are non-diamond materials that get encapsulated
inside diamond during its formation process in the mantle. The trapped materials can be other minerals or fluids like
water.
Carat Weight
Carat weight refers to the size of the diamond. Larger diamonds are generally
more valuable, but price also depends on the other three C’s. Two diamonds of
the same carat weight can vary greatly in value depending on their cut, colour,
and clarity.
Emeralds
Natural Emeralds are precious
green gemstones, a variety of the mineral beryl, ranging from 7.5 to 8 on the
Mohs hardness scale. Highly
prized for their vivid green to bluish-green color, they often contain natural
inclusions known as "jardin" (garden), which act as a
sign of authenticity. May's birthstone, they are often more expensive than
diamonds.
Emeralds are found in several parts of the world, including
Colombia, Brazil, Zambia, Ethiopia, Russia, the United States, and Australia.
They form when the mineral beryl develops in the Earth under specific
conditions where elements such as beryllium come into contact with chromium or
vanadium, which give emeralds their characteristic green colour. Because
inclusions are common, it is common that many emeralds are treated with clarity
enhancements, often using oils or resins, to make the fissures less visible and
improve the gemstone’s overall appearance.
Not to be confused with synthetics Emeralds which are common
and much less expensive.
Pearls
Pearls are produced by certain mollusks, mainly oysters in saltwater and mussels in
freshwater, and they are found in different regions around the world. Saltwater
pearls are commonly cultivated in places such as Japan and China (Akoya
pearls), French Polynesia around Tahiti (Tahitian pearls), and areas including
Australia, Indonesia, and the Philippines (South Sea pearls). Freshwater pearls
are mostly produced in lakes and rivers, particularly in China. Pearls form
when a small irritant, such as a parasite or a piece of tissue, becomes trapped
inside the mollusk’s soft body. To protect itself, the mollusk releases layers
of a smooth, shiny substance called nacre around the irritant
Over time, these layers accumulate and form a pearl. This
process can happen naturally, but most pearls today are cultured, meaning
people carefully place a small bead or tissue inside the mollusk to start the
formation process while the pearl still develops through the animal’s natural
coating of nacre. The colour wheel below provides additional information about
the range of pearl colours and how they can vary between different types of
pearls.