Round|Natural|GIA

1.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1528408616

Certificate GIA 1528408616

Diamond specifications and retailer prices

From $3,782 USD
As of October 30, 2026
Save $2,904 USD (43%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,686 USD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.31ct natural round diamond

This 1.31ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1528408616. Listed at 15 retailers as of October 26, 2026, with prices from $3,782 to $6,686, a $2,904 spread on the same certified stone. Wholesale Diamonds Direct lists it at $6,686. 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

1.31
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1528408616
Dimensions6.92 × 6.97 × 4.35 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.92 mm6.97 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528408616
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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: Oct 30
Current: $5,832 USD|Low: $3,307 USD|High: $6,686 USD|Avg: $4,724 USD|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
October 31, 2026
Retailer 8$3,680 USD
Retailer 2$3,782 USD
Retailer 9$3,968 USD
Retailer 11$4,080 USD
Retailer 12$4,445 USD
Retailer 10$4,550 USD
Retailer 3$4,555 USD
Retailer 5$4,688 USD
Retailer 4$4,840 USD
Retailer 6$4,950 USD
Retailer 7$5,296 USD
Retailer 1$5,832 USD
Wholesale Diamonds Direct$6,686 USD

40 data points across 13 retailers

15 retailers$3,782 USD to $6,686 USD

Retailer 1
-
$3,680 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$3,782 USD
View
B+
Retailer 3
-
$3,968 USD
View
Final sale: no returns
B+
Retailer 4
-
$4,080 USD
View
B+
Retailer 5
-
$4,445 USD
A$6,838 AUD
View
B+
Retailer 6
-
$4,550 USD
View
B+
Retailer 7
-
$4,555 USD
View
B+
Retailer 8
-
$4,688 USD
£3,691 GBP
View
B
Retailer 9
-
$4,840 USD
View
B
Retailer 10
-
$4,840 USD
View
B
Retailer 11
-
$4,950 USD
€4,714 EUR
View
B
Retailer 12
-
$5,000 USD
View
B+
Retailer 13
-
$5,296 USD
£4,170 GBP
View
B
Retailer 14
-
$5,832 USD
ZAR 94,221 ZAR
View
Most Expensive
B
Wholesale Diamonds Direct
269988471 · Oct 26
$6,686 USD
View
14 more retailers have this diamond
Prices start from $3,782 USDSave up to $2,904 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
1.31ct Round
$3,782 USD