Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • GIA 1557154271

Certificate GIA 1557154271

Diamond specifications and retailer prices

From $6,784 AUD
As of November 4, 2026
Save $5,868 AUD (46%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $14,363 AUD at NZ Jewellers · As of October 6, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1557154271. Listed at 25 retailers as of November 1, 2026, with a 87% 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557154271
Dimensions7.35 × 5.83 × 4.00 mm
L/W Ratio1.26
Culet sizeNone
Top View
7.35 mm5.83 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557154271
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $14,363 AUD|Low: $6,583 AUD|High: $14,363 AUD|Avg: $9,530 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
Retailer 13
November 7, 2026
Retailer 13$7,179 AUD
Retailer 4$7,292 AUD
Retailer 11$7,781 AUD
Retailer 5$7,849 AUD
Retailer 6$8,047 AUD
Retailer 12$8,235 AUD
Retailer 2$8,294 AUD
Retailer 3$8,977 AUD
Retailer 7$9,331 AUD
Retailer 8$10,477 AUD
Retailer 9$12,652 AUD
Retailer 10$13,918 AUD
NZ Jewellers$14,363 AUD

31 data points across 13 retailers

25 retailers$6,784 AUD to $12,652 AUD

A
Cheapest Retailer
-
$6,784 AUD
A
Retailer 2
-
$7,179 AUD
View
Final sale: no returns
A
Retailer 3
-
$7,241 AUD
View
A
Retailer 4
-
$7,292 AUD
View
B+
Retailer 5
-
$7,693 AUD
View
Retailer 6
-
$7,781 AUD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$7,781 AUD
View
Retailer 8
-
$7,781 AUD
View
Price last confirmed 16 days ago
B+
Retailer 9
-
$7,849 AUD
View
A
Retailer 10
-
$8,047 AUD
View
B+
Retailer 11
-
$8,235 AUD
View
B+
Retailer 12
-
$8,294 AUD
View
B+
Retailer 13
-
$8,369 AUD
View
B+
Retailer 14
-
$8,369 AUD
View
B+
Retailer 15
-
$8,645 AUD
View
B+
Retailer 16
-
$8,807 AUD
View
Retailer 17
-
$8,977 AUD
View
Price last confirmed 29 days ago
Retailer 18
-
$8,977 AUD
View
Price last confirmed 17 days ago
B+
Retailer 19
-
$9,331 AUD
View
Retailer 20
-
$9,472 AUD
View
Price last confirmed 23 days ago
B
Retailer 21
-
$10,477 AUD
View
B
Retailer 22
-
$12,652 AUD
View
Retailer 23
-
$13,918 AUD
View
Price last confirmed 10 days ago
Retailer 24
-
$14,363 AUD
View
Price last confirmed 17 days ago
Most Expensive
NZ Jewellers
8be071d4-8e55-4112-a1c0-9c595306d580 · Oct 6
$14,363 AUD
$9,869 USD
View
Price last confirmed 31 days ago
24 more retailers have this diamond
Prices start from $6,784 AUDSave up to $5,868 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.

A
1.51ct Radiant
$6,784 AUD