Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6521501206

Certificate GIA 6521501206

Diamond specifications and retailer prices

From $5,719 USD
As of October 30, 2026
Save $3,760 USD (40%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,968 USD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6521501206. Listed at 18 retailers as of October 29, 2026, with a 66% 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

1.20
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6521501206
Dimensions6.76 × 6.80 × 4.26 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
6.76 mm6.80 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521501206
Side View
Table 56.0%Crown 35°Girdle: THN-STKPavilion 41.4°CuletDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $7,166 USD|Low: $5,719 USD|High: $9,543 USD|Avg: $6,818 USD|+2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 7$5,719 USD
Retailer 2$5,780 USD
Retailer 10$6,053 USD
Retailer 9$6,090 USD
Retailer 3$6,176 USD
Retailer 4$6,248 USD
Retailer 8$6,397 USD
Retailer 1$7,166 USD
Retailer 6$7,985 USD
Retailer 5$9,479 USD

42 data points across 10 retailers

18 retailers$5,719 USD to $9,479 USD

B+
Cheapest Retailer
-
$5,719 USD
B+
Retailer 2
-
$5,780 USD
View
Retailer 3
-
$6,053 USD
View
Price last confirmed 15 days ago
B
Retailer 4
-
$6,090 USD
View
B+
Retailer 5
-
$6,176 USD
£4,863 GBP
View
B+
Retailer 6
-
$6,248 USD
£4,919 GBP
View
Retailer 7
-
$6,397 USD
A$9,842 AUD
View
Price last confirmed 21 days ago
Retailer 8
-
$6,557 USD
View
Price last confirmed 38 days ago
Retailer 9
-
$6,557 USD
View
Price last confirmed 13 days ago
Retailer 10
-
$6,658 USD
View
Price last confirmed 15 days ago
B
Retailer 11
-
$6,716 USD
View
B
Retailer 12
-
$7,166 USD
€6,825 EUR
View
Retailer 13
-
$7,566 USD
View
Price last confirmed 39 days ago
Retailer 14
-
$7,566 USD
View
Price last confirmed 12 days ago
B
Retailer 15
-
$7,985 USD
ZAR 129,001 ZAR
View
B
Retailer 16
-
$9,479 USD
£7,464 GBP
View
Retailer 17
-
$10,968 USD
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
ff94d009-ce99-4fd1-aa99-fb89a8136b35 · Oct 17
$10,968 USD
View
Price last confirmed 14 days ago
17 more retailers have this diamond
Prices start from $5,719 USDSave up to $3,760 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.

B+
1.20ct Round
$5,719 USD