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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 6465178731

Certificate GIA 6465178731

Diamond specifications and retailer prices

From $8,624 NZD
As of November 5, 2026
Save $548 NZD (6%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $18,657 NZD at DreamStone · As of October 21, 2026
View at DreamStone

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6465178731. Listed at 3 retailers as of November 5, 2026, with a relatively tight 6% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6465178731
Dimensions6.99 × 5.68 × 3.93 mm
L/W Ratio1.23
Top View
6.99 mm5.68 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6465178731
Side View
Table 70.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $18,657 NZD|Low: $8,624 NZD|High: $18,657 NZD|Avg: $13,559 NZD
DreamStone
Retailer 2
Retailer 3
Retailer 4
November 7, 2026
Retailer 3$8,624 NZD
Retailer 2$9,173 NZD
Retailer 4$17,229 NZD
DreamStone$18,657 NZD

36 data points across 4 retailers

3 retailers$8,624 NZD to $9,173 NZD

B
Cheapest Retailer
-
$8,624 NZD
B
Retailer 2
-
$9,173 NZD
View
Most Expensive
DreamStone
TC9083 · Oct 21
$18,657 NZD
$10,342 USD
View
Price last confirmed 16 days ago
2 more retailers have this diamond
Prices start from $8,624 NZDSave up to $548 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
$8,624 NZD