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Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 7521758243

Certificate GIA 7521758243

Diamond specifications and retailer prices

From $11,504 AUD
$8,082 USD
As of October 29, 2026
Save $4,381 AUD (28%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $15,885 AUD at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded E 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 7521758243. Listed at 14 retailers as of October 29, 2026, with prices from $11,504 to $15,885, a $4,381 spread on the same certified stone. 77 Diamonds lists it at $15,885. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.82°
Pavilion angle30.53°
OriginNatural
Grading LabGIA
CertificateGIA 7521758243
Dimensions7.47 × 5.67 × 3.84 mm
L/W Ratio1.32
Girdle conditionThick
Key to symbols
Crystal, Cloud, Needle
Top View
7.47 mm5.67 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7521758243
Side View
Table 67.0%Crown 44.82°Girdle: STK-THKPavilion 30.53°Culet: NoneDepth 67.7%

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: Oct 29
Current: $15,885 AUD|Low: $11,349 AUD|High: $15,965 AUD|Avg: $14,192 AUD|+1.7%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 5$11,504 AUD
Retailer 3$13,047 AUD
Retailer 4$14,416 AUD
Retailer 2$15,095 AUD
Retailer 6$15,735 AUD
77 Diamonds$15,885 AUD

37 data points across 6 retailers

14 retailers$11,504 AUD to $15,885 AUD

B+
Cheapest Retailer
-
$11,504 AUD
$8,082 USD
B+
Retailer 2
-
$11,974 AUD
$8,412 USD
View
B+
Retailer 3
-
$12,127 AUD
View
B+
Retailer 4
-
$12,401 AUD
$8,712 USD
View
B+
Retailer 5
-
$12,905 AUD
$9,066 USD
View
B+
Retailer 6
-
$13,047 AUD
$9,166 USD
View
Final sale: no returns
B+
Retailer 7
-
$14,416 AUD
$10,128 USD
View
B
Retailer 8
-
$15,095 AUD
$10,605 USD
View
Retailer 9
-
$15,095 AUD
$10,605 USD
View
Price last confirmed 15 days ago
B
Retailer 10
-
$15,259 AUD
$10,720 USD
View
B
Retailer 11
-
$15,259 AUD
$10,720 USD
View
B
Retailer 12
-
$15,735 AUD
$11,054 USD
View
B
Retailer 13
-
$15,771 AUD
$11,080 USD
View
Most Expensive
B
77 Diamonds
RADZHFUHPAGP · Oct 30
$15,885 AUD
£8,787 GBP
View
13 more retailers have this diamond
Prices start from $11,504 AUDSave up to $4,381 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 Radiant
$11,504 AUD