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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

GD • I/SI1 • GIA 2557750890

Certificate GIA 2557750890

Diamond specifications and retailer prices

From $3,355 SGD
HK$20,500 HKD
As of October 31, 2026
Save $4,455 SGD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $7,810 SGD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by GIA 2557750890. Listed at 18 retailers as of October 27, 2026, with prices from $3,355 to $7,810, a $4,455 spread on the same certified stone. NZ Jewellers lists it at $7,810. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle40°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557750890
Dimensions7.00 × 6.92 × 4.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.00 mm6.92 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2557750890
Side View
Table 57.0%Crown 40°Girdle: THK-VTKPavilion 40.4°Culet: NoneDepth 67.1%

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 31
Current: $7,810 SGD|Low: $3,322 SGD|High: $8,041 SGD|Avg: $4,922 SGD|-2.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 10$3,355 SGD
Retailer 12$3,451 SGD
Retailer 3$3,743 SGD
Retailer 11$4,129 SGD
Retailer 16$4,129 SGD
Retailer 17$4,137 SGD
Retailer 5$4,482 SGD
Retailer 15$4,482 SGD
Retailer 6$4,653 SGD
Retailer 4$4,655 SGD
Retailer 7$4,788 SGD
Retailer 9$4,987 SGD
Retailer 8$5,071 SGD
Retailer 14$5,172 SGD
Retailer 2$5,510 SGD
Retailer 13$7,537 SGD
NZ Jewellers$7,810 SGD

37 data points across 17 retailers

18 retailers$3,355 SGD to $7,810 SGD

A
Cheapest Retailer
-
$3,355 SGD
HK$20,500 HKD
A
Retailer 2
-
$3,451 SGD
₹257,058 INR
View
B+
Retailer 3
-
$3,743 SGD
A$4,504 AUD
View
B+
Retailer 4
-
$4,129 SGD
$3,230 USD
View
B+
Retailer 5
-
$4,129 SGD
$3,230 USD
View
B+
Retailer 6
-
$4,137 SGD
$3,236 USD
View
Final sale: no returns
B+
Retailer 7
-
$4,377 SGD
A$5,268 AUD
View
B+
Retailer 8
-
$4,482 SGD
$3,506 USD
View
B+
Retailer 9
-
$4,482 SGD
$3,506 USD
View
B+
Retailer 10
-
$4,653 SGD
View
B+
Retailer 11
-
$4,655 SGD
$3,641 USD
View
B+
Retailer 12
-
$4,788 SGD
$3,745 USD
View
Retailer 13
-
$4,987 SGD
A$6,001 AUD
View
Price last confirmed 24 days ago
Retailer 14
-
$5,071 SGD
€3,778 EUR
View
Price last confirmed 10 days ago
B+
Retailer 15
-
$5,172 SGD
$4,046 USD
View
B+
Retailer 16
-
$5,510 SGD
ZAR 69,625 ZAR
View
B+
Retailer 17
-
$7,537 SGD
£4,642 GBP
View
Most Expensive
B
NZ Jewellers
82aab777-aac8-4ee4-a9b1-3ad464c35c27 · Oct 27
$7,810 SGD
$6,109 USD
View
17 more retailers have this diamond
Prices start from $3,355 SGDSave up to $4,455 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 Round
$3,355 SGD