CaratHunter
Plans
Cushion|Natural|GIA

1.51ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 6555094950

Certificate GIA 6555094950

Diamond specifications and retailer prices

From $6,774 SGD
HK$41,400 HKD
As of November 1, 2026
Save $6,604 SGD (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $13,378 SGD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two 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 6555094950. Listed at 18 retailers as of October 28, 2026, with prices from $6,774 to $13,378, a $6,604 spread on the same certified stone. Queensmith lists it at $13,378. 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555094950
Dimensions7.66 × 5.89 × 4.00 mm
L/W Ratio1.30
Top View
7.66 mm5.89 mm1.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555094950
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.9%

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 1
Current: $13,378 SGD|Low: $6,725 SGD|High: $13,557 SGD|Avg: $9,516 SGD|+1.2%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 9$6,774 SGD
Retailer 6$7,221 SGD
Retailer 3$7,553 SGD
Retailer 5$7,983 SGD
Retailer 11$8,252 SGD
Retailer 2$8,574 SGD
Retailer 12$8,757 SGD
Retailer 4$8,767 SGD
Retailer 13$9,146 SGD
Retailer 10$9,769 SGD
Retailer 8$10,985 SGD
Retailer 7$13,172 SGD
Queensmith$13,378 SGD

28 data points across 13 retailers

18 retailers$6,774 SGD to $13,378 SGD

A
Cheapest Retailer
-
$6,774 SGD
HK$41,400 HKD
A
Retailer 2
-
$7,221 SGD
₹537,956 INR
View
A
Retailer 3
-
$7,553 SGD
$5,908 USD
View
Retailer 4
-
$7,780 SGD
View
Price last confirmed 17 days ago
A
Retailer 5
-
$7,983 SGD
View
A
Retailer 6
-
$8,252 SGD
$6,455 USD
View
Final sale: no returns
B+
Retailer 7
-
$8,301 SGD
$6,493 USD
View
B+
Retailer 8
-
$8,303 SGD
$6,495 USD
View
Retailer 9
-
$8,390 SGD
$6,563 USD
View
Price last confirmed 17 days ago
B+
Retailer 10
-
$8,574 SGD
£5,281 GBP
View
B+
Retailer 11
-
$8,757 SGD
$6,850 USD
View
Retailer 12
-
$8,767 SGD
A$10,551 AUD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$9,146 SGD
$7,154 USD
View
B+
Retailer 14
-
$9,480 SGD
A$11,408 AUD
View
B+
Retailer 15
-
$9,769 SGD
€7,278 EUR
View
B+
Retailer 16
-
$10,985 SGD
ZAR 138,816 ZAR
View
B
Retailer 17
-
$13,172 SGD
£8,113 GBP
View
Most Expensive
B
Queensmith
6555094950 · Oct 28
$13,378 SGD
£8,240 GBP
View
17 more retailers have this diamond
Prices start from $6,774 SGDSave up to $6,604 SGD

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
1.51ct Cushion
$6,774 SGD