Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

GD • I/SI1 • GIA 1377240735

Certificate GIA 1377240735

Diamond specifications and retailer prices

From $3,763 USD
HK$29,400 HKD
As of October 31, 2026
Save $4,721 USD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,484 USD at NZ Jewellers · As of October 30, 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 1377240735. Listed at 18 retailers as of October 30, 2026, with prices from $3,763 to $8,484, a $4,721 spread on the same certified stone. NZ Jewellers lists it at $8,484. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1377240735
Dimensions7.04 × 6.95 × 4.65 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather
Top View
7.04 mm6.95 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1377240735
Side View
Table 57.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $8,484 USD|Low: $3,315 USD|High: $8,484 USD|Avg: $4,900 USD|+9.0%
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
Retailer 18
November 1, 2026
Retailer 14$3,763 USD
Retailer 6$4,331 USD
Retailer 4$4,424 USD
Retailer 17$4,492 USD
Retailer 5$4,681 USD
Retailer 7$4,770 USD
Retailer 10$4,785 USD
Retailer 12$5,012 USD
Retailer 3$5,072 USD
Retailer 8$5,072 USD
Retailer 9$5,072 USD
Retailer 2$5,217 USD
Retailer 18$5,224 USD
Retailer 15$5,741 USD
Retailer 16$5,853 USD
Retailer 13$6,235 USD
Retailer 11$8,078 USD
NZ Jewellers$8,484 USD

26 data points across 18 retailers

18 retailers$3,763 USD to $8,484 USD

B+
Cheapest Retailer
-
$3,763 USD
HK$29,400 HKD
B+
Retailer 2
-
$4,331 USD
View
B+
Retailer 3
-
$4,424 USD
View
B+
Retailer 4
-
$4,492 USD
View
B+
Retailer 5
-
$4,681 USD
View
Final sale: no returns
B+
Retailer 6
-
$4,770 USD
View
B+
Retailer 7
-
$4,785 USD
SGD 6,466 SGD
View
B+
Retailer 8
-
$5,012 USD
£3,946 GBP
View
B+
Retailer 9
-
$5,072 USD
View
B+
Retailer 10
-
$5,072 USD
View
B+
Retailer 11
-
$5,072 USD
View
B+
Retailer 12
-
$5,217 USD
£4,108 GBP
View
B+
Retailer 13
-
$5,224 USD
View
B+
Retailer 14
-
$5,741 USD
€5,468 EUR
View
B
Retailer 15
-
$5,853 USD
View
B
Retailer 16
-
$6,235 USD
ZAR 100,727 ZAR
View
B
Retailer 17
-
$8,078 USD
£6,361 GBP
View
Most Expensive
B
NZ Jewellers
b1e3832e-6607-4c7c-8ab6-d32f401f6ec3 · Oct 30
$8,484 USD
View
17 more retailers have this diamond
Prices start from $3,763 USDSave up to $4,721 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.

B+
1.51ct Round
$3,763 USD