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Marquise|Natural|GIA

0.80ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 1242098634

Certificate GIA 1242098634

Diamond specifications and retailer prices

From £1,099 GBP
SGD 1,993 SGD
As of October 31, 2026
Save £900 GBP (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,999 GBP at Helzberg Diamonds · As of November 2, 2026
View at Helzberg Diamonds

About this 0.8ct natural marquise diamond

This 0.8ct natural marquise sits in the just-under-one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242098634. Listed at 12 retailers as of October 31, 2026, with prices from £1,099 to £1,999, a £900 spread on the same certified stone. Helzberg Diamonds lists it at £1,999. 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

0.80
Carat
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38°
Pavilion angle38.17°
OriginNatural
Grading LabGIA
CertificateGIA 1242098634
Dimensions9.34 × 4.90 × 2.88 mm
L/W Ratio1.91
Culet sizeNone
Top View
9.34 mm4.90 mm0.80 ctF / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1242098634
Side View
Table 60.0%Crown 38°Girdle: MED-THKPavilion 38.17°Culet: NoneDepth 58.7%

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 31
Current: £1,999 GBP|Low: £1,115 GBP|High: £1,999 GBP|Avg: £1,399 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10£1,115 GBP
Retailer 8£1,129 GBP
Retailer 9£1,134 GBP
Retailer 3£1,214 GBP
Retailer 4£1,239 GBP
Retailer 6£1,347 GBP
Retailer 5£1,399 GBP
Retailer 11£1,498 GBP
Retailer 2£1,571 GBP
Retailer 7£1,794 GBP
Helzberg Diamonds£1,999 GBP

18 data points across 11 retailers

12 retailers£1,099 GBP to £1,999 GBP

A
Cheapest Retailer
-
£1,099 GBP
SGD 1,993 SGD
A
Retailer 2
-
£1,115 GBP
$1,496 USD
View
A
Retailer 3
-
£1,129 GBP
$1,515 USD
View
A
Retailer 4
-
£1,134 GBP
$1,522 USD
View
A
Retailer 5
-
£1,214 GBP
SGD 2,201 SGD
View
A
Retailer 6
-
£1,239 GBP
View
B+
Retailer 7
-
£1,347 GBP
$1,807 USD
View
B+
Retailer 8
-
£1,399 GBP
$1,877 USD
View
B+
Retailer 9
-
£1,498 GBP
$2,010 USD
View
B+
Retailer 10
-
£1,571 GBP
€2,008 EUR
View
B
Retailer 11
-
£1,794 GBP
$2,408 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHIKIGPOMJK · Nov 2
£1,999 GBP
$2,683 USD
View
11 more retailers have this diamond
Prices start from £1,099 GBPSave up to £900 GBP

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
0.80ct Marquise
£1,099 GBP