Round|Natural|GIA

1.30ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1558178921

Certificate GIA 1558178921

Diamond specifications and retailer prices

From $3,891 USD
As of November 6, 2026
Save $4,540 USD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,572 USD at NZ Jewellers · As of September 1, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1558178921. Listed at 15 retailers as of November 2, 2026, with a 117% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.30
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1558178921
Dimensions6.89 × 6.94 × 4.37 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Cloud, Needle, Natural
Top View
6.89 mm6.94 mm1.30 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558178921
Side View
Table 55.0%CrownGirdle: THN-STKPavilion 40.6°Culet: NoneDepth 63.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,431 USD|Low: $3,891 USD|High: $8,982 USD|Avg: $5,398 USD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4$3,891 USD
Retailer 1$4,431 USD
Retailer 5$4,632 USD
Retailer 7$4,975 USD
Retailer 6$4,986 USD
Retailer 8$5,354 USD
Retailer 2$5,851 USD
Retailer 3$8,431 USD

39 data points across 8 retailers

15 retailers$3,891 USD to $8,431 USD

A
Cheapest Retailer
-
$3,891 USD
A
Retailer 2
-
$4,431 USD
View
A
Retailer 3
-
$4,632 USD
View
A
Retailer 4
-
$4,975 USD
View
Final sale: no returns
Retailer 5
-
$4,986 USD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$5,354 USD
View
Retailer 7
-
$5,485 USD
View
Price last confirmed 30 days ago
Retailer 8
-
$5,532 USD
View
Price last confirmed 39 days ago
Retailer 9
-
$5,532 USD
View
Price last confirmed 38 days ago
Retailer 10
-
$5,628 USD
View
Price last confirmed 59 days ago
B+
Retailer 11
-
$5,851 USD
View
B
Retailer 12
-
$8,431 USD
View
Retailer 13
-
$9,173 USD
View
Price last confirmed 31 days ago
Retailer 14
-
$9,333 USD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
ad511fe0-2f1f-423f-be00-3f64ba4482f6 · Sep 1
$9,572 USD
View
Price last confirmed 65 days ago
14 more retailers have this diamond
Prices start from $3,891 USDSave up to $4,540 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
1.30ct Round
$3,891 USD