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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 $275 AUD
$193 USD
As of October 29, 2026
Save $1,323 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,598 AUD 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 $275 to $1,598, a $1,323 spread on the same certified stone. MOH London lists it at $1,598. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $1,598 AUD|Low: $263 AUD|High: $1,609 AUD|Avg: $616 AUD|-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$275 AUD
Retailer 3$307 AUD
Retailer 9$340 AUD
Retailer 10$340 AUD
Retailer 7$455 AUD
Retailer 5$554 AUD
Retailer 4$558 AUD
Retailer 2$674 AUD
Retailer 11$689 AUD
Retailer 6$1,097 AUD
MOH London$1,598 AUD

43 data points across 11 retailers

14 retailers$275 AUD to $1,598 AUD

A
Cheapest Retailer
-
$275 AUD
$193 USD
A
Retailer 2
-
$307 AUD
$216 USD
View
Final sale: no returns
A
Retailer 3
-
$319 AUD
$224 USD
View
A
Retailer 4
-
$340 AUD
$239 USD
View
A
Retailer 5
-
$340 AUD
$239 USD
View
B+
Retailer 6
-
$455 AUD
$320 USD
View
A
Retailer 7
-
$554 AUD
€371 EUR
View
A
Retailer 8
-
$558 AUD
£309 GBP
View
B+
Retailer 9
-
$636 AUD
$447 USD
View
B+
Retailer 10
-
$674 AUD
£373 GBP
View
B+
Retailer 11
-
$689 AUD
$484 USD
View
B
Retailer 12
-
$1,093 AUD
$768 USD
View
B
Retailer 13
-
$1,097 AUD
$771 USD
View
Most Expensive
B
MOH London
5503786487 · Oct 29
$1,598 AUD
£884 GBP
View
13 more retailers have this diamond
Prices start from $275 AUDSave up to $1,323 AUD

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
$275 AUD