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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 $2,624 USD
HK$20,500 HKD
As of October 31, 2026
Save $3,485 USD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $6,109 USD 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 $2,624 to $6,109, a $3,485 spread on the same certified stone. NZ Jewellers lists it at $6,109. 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
Color
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: $6,109 USD|Low: $2,598 USD|High: $6,290 USD|Avg: $3,850 USD|-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$2,624 USD
Retailer 12$2,699 USD
Retailer 3$2,928 USD
Retailer 11$3,230 USD
Retailer 16$3,230 USD
Retailer 17$3,236 USD
Retailer 5$3,506 USD
Retailer 15$3,506 USD
Retailer 6$3,640 USD
Retailer 4$3,641 USD
Retailer 7$3,745 USD
Retailer 9$3,901 USD
Retailer 8$3,967 USD
Retailer 14$4,046 USD
Retailer 2$4,310 USD
Retailer 13$5,895 USD
NZ Jewellers$6,109 USD

37 data points across 17 retailers

18 retailers$2,624 USD to $6,109 USD

A
Cheapest Retailer
-
$2,624 USD
HK$20,500 HKD
A
Retailer 2
-
$2,699 USD
₹257,058 INR
View
B+
Retailer 3
-
$2,928 USD
A$4,504 AUD
View
B+
Retailer 4
-
$3,230 USD
View
B+
Retailer 5
-
$3,230 USD
View
B+
Retailer 6
-
$3,236 USD
View
Final sale: no returns
B+
Retailer 7
-
$3,424 USD
A$5,268 AUD
View
B+
Retailer 8
-
$3,506 USD
View
B+
Retailer 9
-
$3,506 USD
View
B+
Retailer 10
-
$3,640 USD
SGD 4,919 SGD
View
B+
Retailer 11
-
$3,641 USD
View
B+
Retailer 12
-
$3,745 USD
View
Retailer 13
-
$3,901 USD
A$6,001 AUD
View
Price last confirmed 24 days ago
Retailer 14
-
$3,967 USD
€3,778 EUR
View
Price last confirmed 10 days ago
B+
Retailer 15
-
$4,046 USD
View
B+
Retailer 16
-
$4,310 USD
ZAR 69,625 ZAR
View
B+
Retailer 17
-
$5,895 USD
£4,642 GBP
View
Most Expensive
B
NZ Jewellers
82aab777-aac8-4ee4-a9b1-3ad464c35c27 · Oct 27
$6,109 USD
View
17 more retailers have this diamond
Prices start from $2,624 USDSave up to $3,485 USD

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
$2,624 USD