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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1558685000

Certificate GIA 1558685000

Diamond specifications and retailer prices

From $4,124 USD
As of November 1, 2026
Save $3,349 USD (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,473 USD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural radiant diamond

This 1.51ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558685000. Listed at 13 retailers as of October 26, 2026, with prices from $4,124 to $7,473, a $3,349 spread on the same certified stone. Wholesale Diamonds Direct lists it at $7,473. 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
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1558685000
Dimensions7.75 × 5.70 × 3.87 mm
L/W Ratio1.36
Culet sizeNone
Top View
7.75 mm5.70 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558685000
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 67.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,288 USD|Low: $4,124 USD|High: $7,618 USD|Avg: $5,295 USD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Wholesale Diamonds Direct
November 2, 2026
Retailer 10$4,124 USD
Retailer 12$4,171 USD
Retailer 8$4,240 USD
Retailer 9$4,337 USD
Retailer 4$4,470 USD
Retailer 6$4,659 USD
Retailer 13$5,158 USD
Retailer 2$5,174 USD
Retailer 1$5,288 USD
Retailer 7$5,680 USD
Retailer 5$5,842 USD
Retailer 11$6,905 USD
Retailer 3$7,338 USD
Wholesale Diamonds Direct$7,473 USD

31 data points across 14 retailers

13 retailers$4,124 USD to $7,473 USD

A
Cheapest Retailer
-
$4,124 USD
A
Retailer 2
-
$4,171 USD
SGD 5,637 SGD
View
A
Retailer 3
-
$4,240 USD
View
A
Retailer 4
-
$4,337 USD
View
A
Retailer 5
-
$4,470 USD
SGD 6,040 SGD
View
A
Retailer 6
-
$4,659 USD
£3,668 GBP
View
A
Retailer 7
-
$5,158 USD
View
A
Retailer 8
-
$5,174 USD
View
A
Retailer 9
-
$5,288 USD
€5,036 EUR
View
B+
Retailer 10
-
$5,680 USD
View
B
Retailer 11
-
$6,905 USD
View
B
Retailer 12
-
$7,338 USD
View
Most Expensive
B
Wholesale Diamonds Direct
570704296 · Oct 26
$7,473 USD
View
12 more retailers have this diamond
Prices start from $4,124 USDSave up to $3,349 USD

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.

A
1.51ct Radiant
$4,124 USD