Education

CTJ EDUCATION

Shine Brighter with CTJ’s Jewelry Knowledge Hub.

MINED DIAMONDS

– Made of carbon
– Grown in the earth over millions of years.
– Can contain impurities like nitrogen and boron
– No guarantee of conflict free
– Certified by GIA and IGI

IS IT A DIAMOND?

LAB GROWN DIAMONDS

– Made of 100% carbon
– Ethical option
– Grown in weeks in a highly controlled environment
– Purest form of diamond used to grow, a type IIA diamond seed
– Certified by GIA and IGI

DIAMONDS

A diamond symbolises emotions.
It represents what matters most to us.
Love, Memories and Family.

THE CVD PROCESS

GROWING LAB DIAMONDS

There are two techniques commonly used
to grow diamonds:

– CVD (Chemical Vapor Deposition)

– HPHT (High Pressure High Temperature)

The first step in finding the perfect diamond is understanding the 4C’s (colour, clarity, cut and carat). This scale created by the GIA is used to determine the visual traits, quality and value of a diamond.

The colour grade is the evaluation of the amount of colour in a diamond.
Colour in a diamond is due to the presence of elements such as nitrogen and boron during the growth process.
For white diamonds: the less colour a diamond shows, the higher the value.

During the diamond growth process, internal imperfections form inside the diamond.
These are known as inclusions. The clarity grading of a diamond describes the amount of inclusions that are present, how visible they are and their location in the diamond.
Inclusions in a diamond are often described as “birthmarks”. They make your diamond unique and one-of-a-kind.

This is one of the most important C’s. It influences how well the stone is cut and how light interacts with the facets in the diamond.
This will determine the fire, brilliance and scintillation (sparkle) of a diamond.
The GIA bases a diamond’s cut grade on seven components: brightness, fire, scintillation, weight ratio, durability, polish and symmetry.

Carat is the weight of a diamond. It is a major influence in a diamonds value. The higher the carat weight the higher the value.
Two 2ct diamonds can have different measurements based the quality of their cuts.
At CTJ we source stones that have a balance between having a size face up value but not cut too shallow where light leakage is present.

The founder of CTJ Jewellery first delved into the world of diamonds in the early 1970’s. He cultivated his passion for jewellery and the concept of CTJ was created, backed by the idea of making fine jewellery affordable. At CTJ we believe jewellery should be attainable and not just sitting in a window teasing you wondering, will I ever be able to afford a piece like that? CTJ imports diamonds and gemstones directly from manufacturers and cutters, allowing us to offer wholesale prices directly to the public. As Australia’s largest diamond wholesaler, we have a vast inventory of natural diamonds and lab grown diamonds in-store, ready for you to see, touch, and feel — not just view on a computer screen. Visit our Bundall showroom on the Gold Coast to experience the beauty and quality of our diamonds firsthand. With a fully equipped workshop on-site and jewellers boasting over 25 years of experience, CTJ is dedicated to crafting and repairing jewellery with exceptional care and expert craftsmanship. Discover the perfect piece that reflects your style at CTJ Jewellery, where quality meets affordability.

CTJ EDUCATION

CTJ EDUCATION

MINED DIAMONDS

IS IT A DIAMOND?

LAB GROWN DIAMONDS

DIAMONDS

THE CVD PROCESS

GROWING LAB DIAMONDS

KNOW YOUR 4C’s

COLOUR

CLARITY

CUT

CARAT

ABOUT US

CTJ EDUCATION

CTJ EDUCATION

MINED DIAMONDS

IS IT A DIAMOND?

LAB GROWN DIAMONDS

DIAMONDS

THE CVD PROCESS

GROWING LAB DIAMONDS

KNOW YOUR 4C’s

COLOUR

CLARITY

CUT

CARAT

ABOUT US

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