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Radiant|Natural|GIA

1.28ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 2175660157

Certificate GIA 2175660157

Diamond specifications and retailer prices

From $6,074 NZD
As of November 6, 2026
Save $8 NZD (0%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $6,082 NZD at DreamStone · As of November 4, 2026
View at DreamStone

About this 1.28ct natural radiant diamond

This 1.28ct natural radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2175660157. Listed at 2 retailers as of November 4, 2026, with a relatively tight 0% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.28
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
Polish
Symmetry
Fluorescence
OriginNatural
Grading LabGIA
CertificateGIA 2175660157
Dimensions7.17 × 5.66 mm
L/W Ratio1.27
Top View
7.17 mm5.66 mm1.28 ctK / SI1
OriginNatural
CutExcellent
CertificateGIA 2175660157
Side View
Table 69.0%CrownGirdlePavilionCuletDepth 67.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $6,082 NZD|Low: $5,991 NZD|High: $6,757 NZD|Avg: $6,186 NZD|-2.5%
DreamStone
Retailer 2
September 23, 2026
Retailer 2$6,074 NZD
DreamStone$6,082 NZD

5 data points across 2 retailers

2 retailers$6,074 NZD to $6,082 NZD

B
Cheapest Retailer
-
$6,074 NZD
Most Expensive
B
DreamStone
692fe0143b0275f788514b88 · Nov 4
$6,082 NZD
$3,371 USD
View
1 more retailer has this diamond
Prices start from $6,074 NZDSave up to $8 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
1.28ct Radiant
$6,074 NZD