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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

VG • K/SI2 • GIA 2557668439

Certificate GIA 2557668439

Diamond specifications and retailer prices

From $3,711 NZD
As of November 4, 2026
Save $4,817 NZD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,510 NZD at NZ Jewellers · As of September 26, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 2557668439. Listed at 15 retailers as of November 4, 2026, with a 130% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557668439
Dimensions7.08 × 7.16 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.08 mm7.16 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557668439
Side View
Table 58.0%Crown 38°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 64.4%

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: Nov 4
Current: $5,694 NZD|Low: $3,620 NZD|High: $8,914 NZD|Avg: $4,998 NZD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 4$3,711 NZD
Retailer 6$3,995 NZD
Retailer 9$4,019 NZD
Retailer 7$4,077 NZD
Retailer 5$4,083 NZD
Retailer 8$4,787 NZD
Retailer 2$5,134 NZD
Retailer 1$5,694 NZD
Retailer 3$8,528 NZD

43 data points across 9 retailers

15 retailers$3,711 NZD to $8,528 NZD

A
Cheapest Retailer
-
$3,711 NZD
A
Retailer 2
-
$3,995 NZD
View
A
Retailer 3
-
$4,019 NZD
View
A
Retailer 4
-
$4,077 NZD
View
B+
Retailer 5
-
$4,083 NZD
View
Final sale: no returns
Retailer 6
-
$4,554 NZD
View
Price last confirmed 25 days ago
Retailer 7
-
$4,554 NZD
View
Price last confirmed 29 days ago
Retailer 8
-
$4,764 NZD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$4,787 NZD
View
A
Retailer 10
-
$5,134 NZD
View
Retailer 11
-
$5,255 NZD
View
Price last confirmed 28 days ago
B+
Retailer 12
-
$5,694 NZD
View
Retailer 13
-
$6,038 NZD
View
Price last confirmed 45 days ago
B
Retailer 14
-
$8,528 NZD
View
Most Expensive
NZ Jewellers
f89b9305-cc72-4e1f-9aaa-ed09125b63e3 · Sep 26
$10,510 NZD
$5,908 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $3,711 NZDSave up to $4,817 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
$3,711 NZD