CaratHunter
Plans
Round|Natural|GIA

1.29ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 387

Certificate GIA 387

Diamond specifications and retailer prices

From HK$18,136 HKD
As of November 4, 2026
Save HK$3,253 HKD (15%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: HK$21,388 HKD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.29ct natural round diamond

This 1.29ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of November 4, 2026, with prices from HK$18,136 to HK$21,388, a HK$3,253 spread on the same certified stone. Blue Nile lists it at HK$21,388. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.29
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 387
Dimensions6.90 × 6.94 × 4.36 mm
L/W Ratio1.01
Top View
6.90 mm6.94 mm1.29 ctK / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 387
Side View
Table 56.0%CrownGirdle: Thin - Sli. ThickPavilionCulet: NoneDepth 62.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$21,388 HKD|Low: HK$18,136 HKD|High: HK$22,642 HKD|Avg: HK$19,820 HKD|-5.5%
Blue Nile
Retailer 2
Retailer 3
October 28, 2026
Retailer 3HK$18,136 HKD
Retailer 2HK$18,144 HKD
Blue NileHK$21,388 HKD

12 data points across 3 retailers

3 retailersHK$18,136 HKD to HK$21,388 HKD

A
Cheapest Retailer
-
HK$18,136 HKD
A
Retailer 2
-
HK$18,144 HKD
View
Most Expensive
B+
Blue Nile
30169346 · Nov 5
HK$21,388 HKD
$2,729 USD
View
2 more retailers have this diamond
Prices start from HK$18,136 HKDSave up to HK$3,253 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.29ct Round
HK$18,136 HKD