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Radiant|Natural|GIA

1.55ct I SI1 Radiant Natural Diamond

VG • I/SI1 • GIA 6451655887

Certificate GIA 6451655887

Diamond specifications and retailer prices

From $13,488 NZD
As of November 6, 2026
Save $3,885 NZD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $17,372 NZD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.55ct natural radiant diamond

This 1.55ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6451655887. Listed at 4 retailers as of November 6, 2026, with prices from $13,488 to $17,372, a $3,885 spread on the same certified stone. 77 Diamonds lists it at $17,372. 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

1.55
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle47.08°
Pavilion angle31.36°
OriginNatural
Grading LabGIA
CertificateGIA 6451655887
Dimensions7.35 × 5.76 × 3.95 mm
L/W Ratio1.28
Top View
7.35 mm5.76 mm1.55 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6451655887
Side View
Table 67.0%Crown 47.08°Girdle: ThickPavilion 31.36°Culet: NoneDepth 68.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $17,372 NZD|Low: $12,912 NZD|High: $17,659 NZD|Avg: $15,211 NZD|+0.8%
77 Diamonds
Retailer 2
November 7, 2026
Retailer 2$12,912 NZD
77 Diamonds$17,372 NZD

30 data points across 2 retailers

4 retailers$13,488 NZD to $17,372 NZD

Retailer 1
-
$12,912 NZD
Price last confirmed 8 days ago
B
Retailer 2
-
$13,488 NZD
View
B
Retailer 3
-
$13,818 NZD
View
Most Expensive
B
77 Diamonds
RADZGK5WGFYR · Nov 7
$17,372 NZD
£7,583 GBP
View
3 more retailers have this diamond
Prices start from $13,488 NZDSave up to $3,885 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
1.55ct Radiant
$13,488 NZD