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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 $4,664 NZD
HK$20,500 HKD
As of October 31, 2026
Save $6,194 NZD (57%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,858 NZD 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 17 retailers as of October 27, 2026, with prices from $4,664 to $10,858, a $6,194 spread on the same certified stone. NZ Jewellers lists it at $10,858. 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: $10,858 NZD|Low: $4,618 NZD|High: $11,179 NZD|Avg: $6,843 NZD|-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$4,664 NZD
Retailer 12$4,797 NZD
Retailer 3$5,203 NZD
Retailer 11$5,741 NZD
Retailer 16$5,741 NZD
Retailer 17$5,751 NZD
Retailer 5$6,231 NZD
Retailer 15$6,231 NZD
Retailer 6$6,469 NZD
Retailer 4$6,471 NZD
Retailer 7$6,656 NZD
Retailer 9$6,933 NZD
Retailer 8$7,050 NZD
Retailer 14$7,191 NZD
Retailer 2$7,660 NZD
Retailer 13$10,478 NZD
NZ Jewellers$10,858 NZD

37 data points across 17 retailers

17 retailers$4,664 NZD to $10,858 NZD

A
Cheapest Retailer
-
$4,664 NZD
HK$20,500 HKD
A
Retailer 2
-
$4,797 NZD
₹257,058 INR
View
B+
Retailer 3
-
$5,203 NZD
A$4,504 AUD
View
B+
Retailer 4
-
$5,741 NZD
$3,230 USD
View
B+
Retailer 5
-
$5,741 NZD
$3,230 USD
View
B+
Retailer 6
-
$5,751 NZD
$3,236 USD
View
Final sale: no returns
B+
Retailer 7
-
$6,086 NZD
A$5,268 AUD
View
B+
Retailer 8
-
$6,231 NZD
$3,506 USD
View
B+
Retailer 9
-
$6,231 NZD
$3,506 USD
View
B+
Retailer 10
-
$6,469 NZD
SGD 4,919 SGD
View
B+
Retailer 11
-
$6,471 NZD
$3,641 USD
View
B+
Retailer 12
-
$6,656 NZD
$3,745 USD
View
Retailer 13
-
$6,933 NZD
A$6,001 AUD
View
Price last confirmed 24 days ago
B+
Retailer 14
-
$7,191 NZD
$4,046 USD
View
B+
Retailer 15
-
$7,660 NZD
ZAR 69,625 ZAR
View
B+
Retailer 16
-
$10,478 NZD
£4,642 GBP
View
Most Expensive
B
NZ Jewellers
82aab777-aac8-4ee4-a9b1-3ad464c35c27 · Oct 27
$10,858 NZD
$6,109 USD
View
16 more retailers have this diamond
Prices start from $4,664 NZDSave up to $6,194 NZD

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
$4,664 NZD