01
PROPORTION & LIGHT
A beautiful diamond begins with the way it meets the light. We consider its cut, outline and dimensions, choosing proportions that complement the design.
DIAMONDS
Exceptional diamonds.Chosen with care.
We choose lab-grown diamonds for their beauty and the freedom they give us to be exacting about quality and proportion.
Every stone is considered alongside its setting, for a piece that feels balanced, distinctive and entirely yours.
WHY LAB-GROWN
A different origin. The same beauty.
Lab-grown diamonds are real diamonds, grown in a controlled environment. They have essentially the same chemical, physical and optical properties as diamonds formed in the earth.
For us, they offer the freedom to bring exceptional stones and original design together. Their origin is identified through specialist laboratory testing.
THE KATY HALLIDAY STANDARD
Beauty beyond the grade.
02
CLARITY & COLOUR
Our centre diamonds are graded VS1 or higher and selected to be eye-clean. Colour is considered alongside the stone’s shape and the metal of its setting.
03
INDEPENDENT REPORTS
Each centre diamond comes with independent documentation from IGI or GIA. It provides the detail behind the stone; our selection brings the report and its appearance together.
THE FOUR Cs
The details that make a diamond.
Cut
01Cut influences how a diamond catches and returns light — its brightness, fire and sparkle. Shape describes its outline. We consider both, alongside symmetry and polish.
SELECTED FOR LIGHT & PROPORTIONColour
02ColourlessNear colourless
DEFGHIJ
D–F is colourless; G–J is near-colourless. The grade is a starting point: a stone’s appearance also depends on its shape, size and setting.
COLOUR & SETTING, CONSIDERED TOGETHERClarity
03Clarity describes internal inclusions and surface characteristics assessed under magnification. We select centre diamonds graded VS1 or higher, with no inclusions visible to the naked eye in normal viewing.
VS1 OR HIGHER · EYE-CLEANCarat
04Carat measures weight. Length, width and shape determine how large a diamond appears, so consider its measurements as well as its weight. For earrings, total carat weight refers to the pair.
WEIGHT & VISIBLE SIZE ARE DIFFERENTA LITTLE MORE CLARITY
Your questions, answered.
Are lab-grown diamonds real diamonds?
Yes. They are diamonds, with essentially the same chemical, physical and optical properties as natural diamonds. Their origin is different. They are not diamond simulants such as moissanite or cubic zirconia.
Why does Katy Halliday choose lab-grown diamonds?
They give us the freedom to focus on the qualities we value: beautiful light, balanced proportions and a stone that belongs in its setting. We choose them as part of our approach to original fine jewellery.
What documentation comes with my diamond?
Our centre diamonds are supplied with independent documentation from IGI or GIA. The report identifies the diamond as laboratory-grown and records information about the stone. We confirm your diamond’s documentation and measurements with your piece.
How should I choose a diamond size?
Begin with the shape and proportions you enjoy wearing. Compare the stone’s length and width, as well as its carat weight, and use our on-hand images to explore its presence.
Our client care team can help you compare sizes, shapes and metals before you choose.
Can you help me choose?
Of course. Whether you have a particular shape in mind or are deciding between sizes, we can help you consider the details together. Contact our client care team for personal guidance.