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Round|Natural|GIA

5.12ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 1236842856

Certificate GIA 1236842856

Diamond specifications and retailer prices

From $109,590 USD
SGD 148,095 SGD
As of November 3, 2026
Save $21,700 USD (17%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $131,290 USD at Jared · As of November 2, 2026
View at Jared

About this 5.12ct natural round diamond

This 5.12ct natural round sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1236842856. Listed at 4 retailers as of November 2, 2026, with prices from $109,590 to $131,290, a $21,700 spread on the same certified stone. Jared lists it at $131,290. 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

5.12
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1236842856
Dimensions11.05 × 11.10 × 6.81 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather, Needle
Top View
11.05 mm11.10 mm5.12 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236842856
Side View
Table 58.0%Crown 31.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 61.5%

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: Nov 3
Current: $131,290 USD|Low: $109,498 USD|High: $140,093 USD|Avg: $119,609 USD
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 4$109,590 USD
Retailer 2$110,164 USD
Retailer 6$113,639 USD
Retailer 3$119,971 USD
Jared$131,290 USD
Retailer 5$140,093 USD

27 data points across 6 retailers

4 retailers$109,590 USD to $131,290 USD

B+
Cheapest Retailer
-
$109,590 USD
SGD 148,095 SGD
B+
Retailer 2
-
$110,164 USD
£86,743 GBP
View
B+
Retailer 3
-
$119,971 USD
View
Most Expensive
B
Jared
159894785 · Nov 2
$131,290 USD
View
3 more retailers have this diamond
Prices start from $109,590 USDSave up to $21,700 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+
5.12ct Round
$109,590 USD