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Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6422149049

Certificate GIA 6422149049

Diamond specifications and retailer prices

From $22,480 NZD
$12,670 USD
As of November 1, 2026
Save $17,533 NZD (44%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $45,158 NZD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6422149049. Listed at 22 retailers as of November 1, 2026, with a 78% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6422149049
Dimensions7.51 × 7.45 × 4.51 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.51 mm7.45 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6422149049
Side View
Table 59.0%Crown 32°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.4%

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: $26,780 NZD|Low: $21,350 NZD|High: $40,495 NZD|Avg: $29,570 NZD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$22,480 NZD
Retailer 7$24,553 NZD
Retailer 1$26,780 NZD
Retailer 8$27,328 NZD
Retailer 5$27,526 NZD
Retailer 3$30,878 NZD
Retailer 4$37,640 NZD
Retailer 2$40,013 NZD

43 data points across 8 retailers

22 retailers$22,480 NZD to $40,013 NZD

B+
Cheapest Retailer
-
$22,480 NZD
$12,670 USD
B
Retailer 2
-
$23,428 NZD
$13,204 USD
View
B
Retailer 3
-
$23,554 NZD
$13,275 USD
View
B
Retailer 4
-
$23,984 NZD
CA$18,774 CAD
View
B
Retailer 5
-
$24,553 NZD
$13,838 USD
View
Final sale: no returns
B
Retailer 6
-
$25,142 NZD
$14,170 USD
View
B
Retailer 7
-
$25,621 NZD
$14,440 USD
View
B
Retailer 8
-
$26,780 NZD
£11,884 GBP
View
B
Retailer 9
-
$27,328 NZD
$15,402 USD
View
Retailer 10
-
$27,526 NZD
A$23,867 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$27,755 NZD
$15,643 USD
View
B
Retailer 12
-
$28,824 NZD
$16,245 USD
View
B
Retailer 13
-
$28,992 NZD
$16,340 USD
View
B
Retailer 14
-
$28,992 NZD
$16,340 USD
View
B
Retailer 15
-
$29,743 NZD
$16,763 USD
View
B
Retailer 16
-
$29,968 NZD
$16,890 USD
View
B
Retailer 17
-
$29,989 NZD
$16,902 USD
View
B
Retailer 18
-
$30,878 NZD
€16,574 EUR
View
B
Retailer 19
-
$36,295 NZD
$20,456 USD
View
B
Retailer 20
-
$37,640 NZD
ZAR 342,717 ZAR
View
B
Retailer 21
-
$40,013 NZD
£17,757 GBP
View
Most Expensive
Diamond Quarter
1.51SI1D644955AFN · Oct 29
$45,158 NZD
£20,040 GBP
View
Price under review
21 more retailers have this diamond
Prices start from $22,480 NZDSave up to $17,533 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+
1.51ct Round
$22,480 NZD