Radiant|Natural|GIA

1.51ct F SI1 Radiant Natural Diamond

EX • F/SI1 • GIA 6545057025

Certificate GIA 6545057025

Diamond specifications and retailer prices

From $8,070 USD
A$12,415 AUD
As of November 1, 2026
Save $6,309 USD (44%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $14,379 USD at NZ Jewellers · As of October 30, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545057025. Listed at 20 retailers as of October 30, 2026, with prices from $8,070 to $14,379, a $6,309 spread on the same certified stone. NZ Jewellers lists it at $14,379. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
F
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.53°
Pavilion angle29.05°
OriginNatural
Grading LabGIA
CertificateGIA 6545057025
Dimensions5.53 × 8.15 × 3.60 mm
L/W Ratio1.47
Top View
5.53 mm8.15 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545057025
Side View
Table 66.0%Crown 43.53°Girdle: Very ThickPavilion 29.05°Culet: NoneDepth 65.2%

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 1
Current: $14,379 USD|Low: $7,908 USD|High: $14,830 USD|Avg: $10,105 USD|-3.0%
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
Retailer 19
November 2, 2026
Retailer 9$8,077 USD
Retailer 19$8,570 USD
Retailer 5$8,627 USD
Retailer 15$8,627 USD
Retailer 8$8,699 USD
Retailer 6$9,346 USD
Retailer 2$9,431 USD
Retailer 13$9,475 USD
Retailer 18$9,490 USD
Retailer 3$9,587 USD
Retailer 4$10,190 USD
Retailer 17$10,190 USD
Retailer 11$10,305 USD
Retailer 14$10,470 USD
Retailer 16$10,530 USD
Retailer 7$10,784 USD
Retailer 10$11,355 USD
Retailer 12$13,473 USD
NZ Jewellers$14,379 USD

42 data points across 19 retailers

20 retailers$8,070 USD to $14,379 USD

B+
Cheapest Retailer
-
$8,070 USD
A$12,415 AUD
B+
Retailer 2
-
$8,077 USD
View
B+
Retailer 3
-
$8,570 USD
View
B+
Retailer 4
-
$8,627 USD
View
B+
Retailer 5
-
$8,627 USD
View
Final sale: no returns
B+
Retailer 6
-
$8,699 USD
View
B+
Retailer 7
-
$9,346 USD
View
B+
Retailer 8
-
$9,431 USD
£7,426 GBP
View
Retailer 9
-
$9,475 USD
A$14,577 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$9,490 USD
View
B+
Retailer 11
-
$9,587 USD
View
B
Retailer 12
-
$10,190 USD
View
B
Retailer 13
-
$10,190 USD
View
B
Retailer 14
-
$10,305 USD
View
B
Retailer 15
-
$10,470 USD
View
B
Retailer 16
-
$10,530 USD
View
B
Retailer 17
-
$10,784 USD
View
Retailer 18
-
$11,355 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
$13,473 USD
£10,609 GBP
View
Most Expensive
B
NZ Jewellers
1e0b6c26-ff93-4381-948b-98c0c0e75016 · Oct 30
$14,379 USD
View
19 more retailers have this diamond
Prices start from $8,070 USDSave up to $6,309 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 Radiant
$8,070 USD