G and H are the first two grades of the near-colourless range, the part of the scale where buyers look for a diamond that faces up white without paying for a colourless grade. The difference between them is real but faint, and it only appears under certain conditions. We show both on real stones from our certified loose diamonds in Beirut and our GIA-certified diamonds, each filmed in 360°, so you can judge the colour yourself.
What the two grades mean
Colour grades how little tint a diamond shows. Laboratories grade it with the stone face-down against master stones under controlled light, because face-up the sparkle masks body colour. On the GIA scale, D to F are colourless and G to J near colourless; HRD uses the same letters. G is the top of the near-colourless group and H the next step down.
| G | H | |
|---|---|---|
| Group | Near colourless, first grade | Near colourless, second grade |
| Face-down beside a master stone | A trace of warmth, hard to see | A slightly clearer trace of warmth |
| Face-up in a ring | White | White in almost every setting |
| Shows more in | Large stones, elongated shapes | Large stones, elongated shapes, platinum and white gold |
| Best metal | Any | Any; yellow and rose gold hide it fully |
Colour also builds with the amount of diamond the light travels through, so the same letter reads warmer in a large or deep stone than in a small one. Our colour and clarity chart shows both grades on the full D to Z scale and how they pair with each clarity grade.
See the difference on real stones
Here is one stone of each grade from our Beirut stock with its 360° video and full grades; they may differ in size, shape or clarity, so judge the whiteness of the body as each stone turns, not the sparkle.
When to choose G
G is worth the step up when the conditions give colour a chance to show.
- A large stone in white metal. Above about 1.5 carats in platinum or white gold, the larger body of diamond and the cool frame make a trace of warmth easier to sense.
- An elongated or cornered shape. Ovals, pears, radiants and cushions can gather colour at their tips and corners, where a round spreads it evenly.
- Whiter stones beside it. A halo or side stones of a whiter grade give the eye a comparison it would otherwise never get, so match the centre stone to them.
When to choose H
For a round brilliant up to about 1.5 carats, H is where we would put the money for most rings. Face-up and set, it reads as white, and the saving against a G can buy a better cut or a little more size, both of which show from across a room.
H is also the natural choice for yellow or rose gold, where the metal reflects warmth into any stone and the gap between G and H disappears. And if you like a crisp look in daylight, faint or medium blue fluorescence can make an H face up a touch whiter still.
How shape, size and setting change the answer
Shape
A round brilliant masks a hint of colour best, because its facets return light evenly across the stone. Elongated shapes such as an oval, and step cuts such as the emerald, show body colour more openly, so lean towards G for those.
Size
Under one carat, G and H are interchangeable to the eye. From about 1.5 carats in white metal, a careful buyer may start to prefer G, and the case for it strengthens as the stone grows.
Metal and setting
Platinum and white gold give the stone a cool frame that makes warmth easier to notice; yellow and rose gold do the opposite. Our ring metal guide compares them. Colour is also only half the picture: pair either grade with an eye-clean clarity and an excellent cut, and the stone will look white and bright.
How we would choose
A round under about 1.5 carats: buy H with confidence. A larger stone, an elongated shape or a platinum solitaire: G gives you a margin. For the step above, see our comparison of F and G colour. Send us the shape, size and metal on WhatsApp and we will send the certificate and 360° video of each stone that fits.
Common questions
Is H colour good for an engagement ring?
Yes. H is a near-colourless grade that faces up white in almost every setting, and in yellow or rose gold it is indistinguishable from whiter grades. It is one of the best-value colours for a round diamond up to about 1.5 carats, leaving more of the budget for cut and size.
Can you tell G from H colour once the stone is set?
Rarely. The difference is graded face-down against master stones under controlled light. Face-up in a ring, where sparkle masks body colour, the two look the same to almost every eye. Side by side in daylight, the H may look a touch warmer, especially in larger stones.
Does H colour look yellow in white gold?
No. In a well-cut stone, H looks white in white gold and platinum. A hint of warmth may show from the side in larger stones, or at the tips of an oval or pear, but face-up at a normal distance the stone reads as white.
Is G colour with SI1 clarity better than H with VS2?
Both can be excellent, so choose by what is easier to verify. H VS2 is the safer pair, because VS2 is almost always eye-clean and H faces up white. G SI1 can be lovely if the video shows small, off-centre inclusions. Either way, put the cut first.
Is G colour worth it in yellow gold?
Rarely. Yellow gold reflects warmth into the diamond, so an H, or even an I or J, looks as white against it as a G. Save the colour budget for a platinum or white gold ring, or spend it on cut and size instead.