CaratHunter
Plans
Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

VG • M/SI2 • GIA 2456800101

Certificate GIA 2456800101

Diamond specifications and retailer prices

From $2,600 AUD
As of November 5, 2026
Save $1,300 AUD (33%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $7,018 AUD 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 2456800101. Listed at 9 retailers as of November 5, 2026, with a 50% 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
M
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 2456800101
Dimensions7.14 × 7.23 × 4.58 mm
L/W Ratio1.01
Star length50%
Top View
7.14 mm7.23 mm1.51 ctM / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2456800101
Side View
Table 57.0%Crown 37.5°Girdle: THN-THKPavilion 40.4°Culet: NoneDepth 63.7%

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: Nov 5
Current: $7,018 AUD|Low: $1,910 AUD|High: $7,018 AUD|Avg: $3,449 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 4$1,910 AUD
Retailer 3$2,600 AUD
Retailer 7$2,788 AUD
Retailer 6$2,877 AUD
Retailer 8$2,877 AUD
Retailer 5$3,010 AUD
Retailer 10$3,074 AUD
Retailer 9$3,320 AUD
Retailer 11$3,424 AUD
Retailer 2$3,900 AUD
Retailer 12$4,648 AUD
NZ Jewellers$7,018 AUD

20 data points across 12 retailers

9 retailers$2,600 AUD to $3,900 AUD

B+
Cheapest Retailer
-
$2,600 AUD
B+
Retailer 2
-
$2,788 AUD
View
B+
Retailer 3
-
$2,877 AUD
View
Retailer 4
-
$2,877 AUD
View
Price last confirmed 8 days ago
Retailer 5
-
$3,010 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$3,074 AUD
View
B+
Retailer 7
-
$3,320 AUD
View
B+
Retailer 8
-
$3,900 AUD
View
Most Expensive
NZ Jewellers
a20808a0-c760-416a-9112-41d39527abfd · Oct 30
$7,018 AUD
$4,913 USD
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from $2,600 AUDSave up to $1,300 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
$2,600 AUD