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Round|Natural|GIA

1.50ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2121672455

Certificate GIA 2121672455

Diamond specifications and retailer prices

From $13,159 AUD
$9,245 USD
As of October 25, 2026
Save $12,265 AUD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $25,424 AUD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2121672455. Listed at 19 retailers as of October 25, 2026, with prices from $13,159 to $25,424, a $12,265 spread on the same certified stone. Diamond Quarter lists it at $25,424. 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

1.50
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2121672455
Dimensions7.32 × 7.30 × 4.55 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.32 mm7.30 mm1.50 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2121672455
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.3%

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 25
Current: $17,883 AUD|Low: $12,339 AUD|High: $23,406 AUD|Avg: $17,425 AUD|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$13,159 AUD
Retailer 5$14,808 AUD
Retailer 2$15,836 AUD
Retailer 1$17,883 AUD
Retailer 6$19,483 AUD
Retailer 3$23,251 AUD

40 data points across 6 retailers

19 retailers$13,159 AUD to $25,424 AUD

B+
Cheapest Retailer
-
$13,159 AUD
$9,245 USD
B+
Retailer 2
-
$13,484 AUD
$9,473 USD
View
B+
Retailer 3
-
$13,740 AUD
$9,653 USD
View
B+
Retailer 4
-
$14,150 AUD
CA$13,807 CAD
View
B
Retailer 5
-
$14,808 AUD
$10,403 USD
View
B
Retailer 6
-
$14,808 AUD
$10,403 USD
View
Final sale: no returns
B+
Retailer 7
-
$15,836 AUD
£8,760 GBP
View
B
Retailer 8
-
$16,042 AUD
$11,270 USD
View
B
Retailer 9
-
$16,289 AUD
$11,444 USD
View
B
Retailer 10
-
$17,105 AUD
$12,017 USD
View
B
Retailer 11
-
$17,323 AUD
$12,170 USD
View
B
Retailer 12
-
$17,323 AUD
$12,170 USD
View
B
Retailer 13
-
$17,883 AUD
€11,965 EUR
View
B
Retailer 14
-
$17,892 AUD
$12,570 USD
View
B
Retailer 15
-
$18,510 AUD
$13,004 USD
View
B
Retailer 16
-
$19,483 AUD
$13,688 USD
View
B
Retailer 17
-
$23,251 AUD
£12,862 GBP
View
B
Retailer 18
-
$24,680 AUD
$17,339 USD
View
Most Expensive
B
Diamond Quarter
1.5SI2E2155C50DN · Oct 29
$25,424 AUD
£14,064 GBP
View
18 more retailers have this diamond
Prices start from $13,159 AUDSave up to $12,265 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+
1.50ct Round
$13,159 AUD