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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 $16,461 NZD
$9,245 USD
As of October 25, 2026
Save $15,342 NZD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $31,803 NZD 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 $16,461 to $31,803, a $15,342 spread on the same certified stone. Diamond Quarter lists it at $31,803. 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: $22,369 NZD|Low: $15,435 NZD|High: $29,278 NZD|Avg: $21,797 NZD|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$16,461 NZD
Retailer 5$18,523 NZD
Retailer 2$19,809 NZD
Retailer 1$22,369 NZD
Retailer 6$24,371 NZD
Retailer 3$29,084 NZD

40 data points across 6 retailers

19 retailers$16,461 NZD to $31,803 NZD

B+
Cheapest Retailer
-
$16,461 NZD
$9,245 USD
B+
Retailer 2
-
$16,867 NZD
$9,473 USD
View
B+
Retailer 3
-
$17,187 NZD
$9,653 USD
View
B+
Retailer 4
-
$17,700 NZD
CA$13,807 CAD
View
B
Retailer 5
-
$18,523 NZD
$10,403 USD
View
B
Retailer 6
-
$18,523 NZD
$10,403 USD
View
Final sale: no returns
B+
Retailer 7
-
$19,809 NZD
£8,760 GBP
View
B
Retailer 8
-
$20,066 NZD
$11,270 USD
View
B
Retailer 9
-
$20,376 NZD
$11,444 USD
View
B
Retailer 10
-
$21,396 NZD
$12,017 USD
View
B
Retailer 11
-
$21,669 NZD
$12,170 USD
View
B
Retailer 12
-
$21,669 NZD
$12,170 USD
View
B
Retailer 13
-
$22,369 NZD
€11,965 EUR
View
B
Retailer 14
-
$22,381 NZD
$12,570 USD
View
B
Retailer 15
-
$23,154 NZD
$13,004 USD
View
B
Retailer 16
-
$24,371 NZD
$13,688 USD
View
B
Retailer 17
-
$29,084 NZD
£12,862 GBP
View
B
Retailer 18
-
$30,872 NZD
$17,339 USD
View
Most Expensive
B
Diamond Quarter
1.5SI2E2155C50DN · Oct 29
$31,803 NZD
£14,064 GBP
View
18 more retailers have this diamond
Prices start from $16,461 NZDSave up to $15,342 NZD

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
$16,461 NZD