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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

GD • I/SI1 • GIA 1377240735

Certificate GIA 1377240735

Diamond specifications and retailer prices

From $5,296 AUD
HK$29,100 HKD
As of October 29, 2026
Save $6,767 AUD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,063 AUD 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 1377240735. Listed at 18 retailers as of October 27, 2026, with prices from $5,296 to $12,063, a $6,767 spread on the same certified stone. NZ Jewellers lists it at $12,063. 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
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 29
Current: $12,063 AUD|Low: $4,714 AUD|High: $12,063 AUD|Avg: $6,866 AUD|+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
October 29, 2026
Retailer 8$5,296 AUD
Retailer 5$6,158 AUD
Retailer 3$6,290 AUD
Retailer 16$6,387 AUD
Retailer 4$6,656 AUD
Retailer 6$6,782 AUD
Retailer 10$6,804 AUD
Retailer 13$7,111 AUD
Retailer 7$7,212 AUD
Retailer 9$7,212 AUD
Retailer 18$7,212 AUD
Retailer 17$7,429 AUD
Retailer 2$7,461 AUD
Retailer 12$8,119 AUD
Retailer 14$8,322 AUD
Retailer 15$8,783 AUD
Retailer 11$11,548 AUD
NZ Jewellers$12,063 AUD

23 data points across 18 retailers

18 retailers$5,296 AUD to $12,063 AUD

B+
Cheapest Retailer
-
$5,296 AUD
HK$29,100 HKD
B+
Retailer 2
-
$6,158 AUD
$4,331 USD
View
B+
Retailer 3
-
$6,290 AUD
$4,424 USD
View
B+
Retailer 4
-
$6,387 AUD
$4,492 USD
View
B+
Retailer 5
-
$6,656 AUD
$4,681 USD
View
Final sale: no returns
B+
Retailer 6
-
$6,782 AUD
$4,770 USD
View
B+
Retailer 7
-
$6,804 AUD
SGD 6,466 SGD
View
B+
Retailer 8
-
$7,111 AUD
£3,938 GBP
View
B+
Retailer 9
-
$7,212 AUD
$5,072 USD
View
B+
Retailer 10
-
$7,212 AUD
$5,072 USD
View
B+
Retailer 11
-
$7,212 AUD
$5,072 USD
View
B+
Retailer 12
-
$7,429 AUD
$5,224 USD
View
B+
Retailer 13
-
$7,461 AUD
£4,132 GBP
View
B+
Retailer 14
-
$8,119 AUD
€5,438 EUR
View
B
Retailer 15
-
$8,322 AUD
$5,853 USD
View
B
Retailer 16
-
$8,783 AUD
ZAR 99,785 ZAR
View
B
Retailer 17
-
$11,548 AUD
£6,395 GBP
View
Most Expensive
B
NZ Jewellers
b1e3832e-6607-4c7c-8ab6-d32f401f6ec3 · Oct 27
$12,063 AUD
$8,484 USD
View
17 more retailers have this diamond
Prices start from $5,296 AUDSave up to $6,767 AUD

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
$5,296 AUD