Round|Lab Grown|GIA

1.20ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 5503786487

Certificate GIA 5503786487

Diamond specifications and retailer prices

From $193 USD
As of October 29, 2026
Save $930 USD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,123 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown 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 5503786487. Listed at 14 retailers as of October 29, 2026, with prices from $193 to $1,123, a $930 spread on the same certified stone. MOH London lists it at $1,123. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.2°
OriginLab Grown
Grading LabGIA
CertificateGIA 5503786487
Dimensions6.80 × 6.77 × 4.23 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.80 mm6.77 mm1.20 ctD / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5503786487
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
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: Oct 29
Current: $1,123 USD|Low: $185 USD|High: $1,130 USD|Avg: $433 USD|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 8$193 USD
Retailer 3$216 USD
Retailer 9$239 USD
Retailer 10$239 USD
Retailer 7$320 USD
Retailer 5$390 USD
Retailer 4$392 USD
Retailer 2$474 USD
Retailer 11$484 USD
Retailer 6$771 USD
MOH London$1,123 USD

43 data points across 11 retailers

14 retailers$193 USD to $1,123 USD

A
Cheapest Retailer
-
$193 USD
A
Retailer 2
-
$216 USD
View
Final sale: no returns
A
Retailer 3
-
$224 USD
View
A
Retailer 4
-
$239 USD
View
A
Retailer 5
-
$239 USD
View
B+
Retailer 6
-
$320 USD
View
A
Retailer 7
-
$390 USD
€371 EUR
View
A
Retailer 8
-
$392 USD
£309 GBP
View
B+
Retailer 9
-
$447 USD
View
B+
Retailer 10
-
$474 USD
£373 GBP
View
B+
Retailer 11
-
$484 USD
View
B
Retailer 12
-
$768 USD
View
B
Retailer 13
-
$771 USD
View
Most Expensive
B
MOH London
5503786487 · Oct 29
$1,123 USD
£884 GBP
View
13 more retailers have this diamond
Prices start from $193 USDSave up to $930 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
1.20ct Round
$193 USD