CaratHunter
Plans
Cushion|Natural|GIA

1.00ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 2564185089

Certificate GIA 2564185089

Diamond specifications and retailer prices

From HK$13,142 HKD
$1,675 USD
As of October 28, 2026
Save HK$3,240 HKD (20%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$16,382 HKD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2564185089. Listed at 6 retailers as of October 28, 2026, with prices from HK$13,142 to HK$16,382, a HK$3,240 spread on the same certified stone. Blue Nile lists it at HK$16,382. 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

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564185089
Dimensions5.59 × 5.36 × 3.72 mm
L/W Ratio1.04
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
5.59 mm5.36 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564185089
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.4%

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: Oct 28
Current: HK$16,382 HKD|Low: HK$12,012 HKD|High: HK$17,245 HKD|Avg: HK$14,685 HKD|-5.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4HK$13,142 HKD
Retailer 3HK$13,675 HKD
Retailer 5HK$13,675 HKD
Retailer 2HK$14,935 HKD
Retailer 6HK$15,676 HKD
Blue NileHK$16,382 HKD

39 data points across 6 retailers

6 retailersHK$13,142 HKD to HK$16,382 HKD

A
Cheapest Retailer
-
HK$13,142 HKD
$1,675 USD
A
Retailer 2
-
HK$13,675 HKD
$1,743 USD
View
A
Retailer 3
-
HK$13,675 HKD
$1,743 USD
View
Final sale: no returns
A
Retailer 4
-
HK$14,935 HKD
£1,499 GBP
View
A
Retailer 5
-
HK$15,676 HKD
SGD 2,700 SGD
View
Most Expensive
A
Blue Nile
30120227 · Oct 31
HK$16,382 HKD
$2,088 USD
View
5 more retailers have this diamond
Prices start from HK$13,142 HKDSave up to HK$3,240 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
1.00ct Cushion
HK$13,142 HKD