I Colour

Live pricing and availability for I colour diamonds across natural and lab-grown origins.

Total listings
1,252,546
Natural median (HKD)
HK$16,923/ct
Lab-grown median (HKD)
HK$10,712/ct

What I Colour Means for Buyers

I sits on the GIA colour scale that runs from D (colourless) at the top through to Z (faint yellow or brown). The higher up you go toward D, the rarer the stone and the steeper the price curve. But a huge number of buyers never tell the difference between two adjacent grades in a finished ring, especially once the diamond is mounted in yellow or rose gold.

Right now we're tracking 1,252,546 active I colour listings across our retailer network. The typical natural I diamond trades around HK$16,923/ct while the lab-grown equivalent sits at HK$10,712/ct. Roughly a 37% gap that reflects the broader natural-vs-lab pricing gap, not a quality difference at this grade.

I commands a modest 8.5% premium over the neighboring J grade. For buyers who prioritise face-up appearance over spec sheets, J delivers almost all of the visual quality for noticeably less. Pay for I only if you care about the grade showing on the cert.

I shows up most often in ROUND. About 565,420 listings at this moment. Followed by OVAL. Most of the supply clusters around the 0.5-0.99ct carat range, where demand is strongest and retailers keep the deepest inventory. If you're shopping an unusual shape or carat, expect thinner selection.

For most engagement-ring buyers, the practical sweet spot for colour is G or H. Colourless-appearing face-up, still a near-colourless grade on paper, and priced 30 to 50% below the D-E tier. If you're setting the stone in yellow or rose gold, you can comfortably go down to I or J without the stone looking warm. Save the money for a better cut grade; cut drives sparkle far more than the last step of colour.

Breakdown by Shape

ShapeOriginListingsMedian (HKD)
ROUNDnatural565,420HK$15,604/ct
OVALnatural130,840HK$19,834/ct
EMERALDnatural101,634HK$18,068/ct
PEARnatural98,328HK$17,327/ct
ROUNDlab grown76,449HK$11,700/ct
CUSHIONnatural56,744HK$20,800/ct
PRINCESSnatural50,785HK$17,500/ct
HEARTnatural44,635HK$16,786/ct
RADIANTnatural28,716HK$18,769/ct
ASSCHERnatural24,464HK$17,860/ct
MARQUISEnatural22,194HK$17,060/ct
OVALlab grown14,192HK$11,529/ct
PEARlab grown13,865HK$9,569/ct
EMERALDlab grown7,766HK$6,823/ct
PRINCESSlab grown3,664HK$9,679/ct
CUSHIONlab grown3,402HK$7,728/ct
RADIANTlab grown2,996HK$7,158/ct
MARQUISElab grown1,844HK$10,148/ct
HEARTlab grown1,702HK$8,454/ct
OTHERnatural1,160HK$23,316/ct
ASSCHERlab grown880HK$6,844/ct
TRILLIONnatural448HK$26,914/ct
OTHERlab grown207HK$3,815/ct
BAGUETTEnatural132HK$28,170/ct
ROUNDunknown43HK$11,894/ct
BAGUETTElab grown37HK$3,918/ct
SQ_RADIANTnatural24HK$9,280/ct
TRILLIONlab grown18HK$4,269/ct

Breakdown by Carat

CaratOriginListingsMedian (HKD)
0.5-0.99ctnatural395,699HK$12,544/ct
0.5-0.99ctlab grown32,287HK$12,705/ct
0.5-0.99ctunknown2HK$17,071/ct
1.0-1.49ctnatural265,076HK$21,557/ct
1.0-1.49ctlab grown18,812HK$11,445/ct
1.0-1.49ctunknown6HK$25,057/ct
1.5-1.99ctnatural137,792HK$32,901/ct
1.5-1.99ctlab grown24,814HK$8,825/ct
1.5-1.99ctunknown4HK$45,374/ct
2.0-2.99ctnatural82,662HK$50,938/ct
2.0-2.99ctlab grown22,751HK$10,084/ct
2.0-2.99ctunknown1HK$50,419/ct
3.0ct+natural38,882HK$95,223/ct
3.0ct+lab grown15,923HK$9,763/ct
3.0ct+unknown1HK$123,582/ct
under-0.5ctnatural205,413HK$11,223/ct
under-0.5ctlab grown12,437HK$12,008/ct
under-0.5ctunknown34HK$10,713/ct
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