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Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

VG • E/SI1 • GIA 2221285699

Certificate GIA 2221285699

Diamond specifications and retailer prices

From $16,796 NZD
A$14,564 AUD
As of October 30, 2026
Save $4,176 NZD (20%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $20,972 NZD at Zales · As of October 30, 2026
View at Zales

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 2221285699. Listed at 6 retailers as of October 30, 2026, with prices from $16,796 to $20,972, a $4,176 spread on the same certified stone. Zales lists it at $20,972. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2221285699
Dimensions7.30 × 5.84 × 4.00 mm
L/W Ratio1.25
Top View
7.30 mm5.84 mm1.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2221285699
Side View
Table 71.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.5%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $20,615 NZD|Low: $15,681 NZD|High: $20,913 NZD|Avg: $18,605 NZD|+1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 4$17,061 NZD
Retailer 2$17,250 NZD
Retailer 3$19,877 NZD
Retailer 1$20,615 NZD

35 data points across 4 retailers

6 retailers$16,796 NZD to $20,972 NZD

B
Cheapest Retailer
-
$16,796 NZD
A$14,564 AUD
B
Retailer 2
-
$17,061 NZD
$9,616 USD
View
B
Retailer 3
-
$17,250 NZD
$9,722 USD
View
Final sale: no returns
B
Retailer 4
-
$19,877 NZD
$11,203 USD
View
B
Retailer 5
-
$20,615 NZD
£9,148 GBP
View
Most Expensive
B
Zales
517207766 · Oct 30
$20,972 NZD
$11,820 USD
View
5 more retailers have this diamond
Prices start from $16,796 NZDSave up to $4,176 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 Radiant
$16,796 NZD