Every Whitemoon diamond ships with an independent report from IGI or GIA. It looks technical, but you can read it in five minutes. Here is what each part tells you.

The report number

Every report has a unique number. Enter it on the lab's own website and the online record should match the paper report line for line. Many stones also carry the number laser-inscribed on the girdle, visible under magnification.

Origin

A lab-grown diamond's report says so clearly — look for "laboratory-grown" in the description. It should never be left out.

The four Cs

• Carat — weight, not size. Two stones of the same carat can look different depending on cut and shape.
• Colour — on the D-to-Z scale, D is colourless. D–F is colourless, G–J near-colourless; the difference between neighbouring grades is very hard to see once the stone is set.
• Clarity — from FL (flawless) through IF, VVS1–VVS2, VS1–VS2, SI1–SI2 to I. A VS stone looks clean to the naked eye.
• Cut — for round diamonds, the grade (Excellent / Ideal down to Poor) describes how well the stone returns light. It matters more to sparkle than any other C.

The lines people skip

• Measurements — the stone's dimensions in millimetres; useful for comparing how big two stones will look.
• Polish and symmetry — the finish of the facets. Excellent or Very Good is what you want.
• Fluorescence — how the stone glows under UV light. None or faint is the norm; strong can occasionally make a stone look hazy.
• The plot — a map of where any inclusions sit. Inclusions near the edge are easier to hide under a prong.

Still unsure?

Book an appointment — in person or virtual — and we will read the report with you, stone in hand.