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Marquise|Natural|GIA

0.77ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 3555866191

Certificate GIA 3555866191

Diamond specifications and retailer prices

From £302 GBP
As of November 5, 2026
Save £396 GBP (57%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £698 GBP at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.77ct natural marquise diamond

This 0.77ct natural marquise sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 3555866191. Listed at 9 retailers as of November 5, 2026, with prices from £302 to £698, a £396 spread on the same certified stone. Frank Darling lists it at £698. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.77
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.25°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 3555866191
Dimensions8.76 × 4.74 × 3.12 mm
L/W Ratio1.85
Culet sizeNone
Top View
8.76 mm4.74 mm0.77 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555866191
Side View
Table 60.0%Crown 40.25°Girdle: MED-VTKPavilion 41.8°Culet: NoneDepth 65.8%

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: Nov 5
Current: £698 GBP|Low: £302 GBP|High: £768 GBP|Avg: £509 GBP|-9.2%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 3£302 GBP
Retailer 2£357 GBP
Retailer 8£380 GBP
Retailer 7£467 GBP
Retailer 4£493 GBP
Retailer 5£531 GBP
Retailer 6£584 GBP
Frank Darling£698 GBP

25 data points across 8 retailers

9 retailers£302 GBP to £698 GBP

A
Cheapest Retailer
-
£302 GBP
A
Retailer 2
-
£357 GBP
View
A
Retailer 3
-
£380 GBP
View
A
Retailer 4
-
£467 GBP
View
A
Retailer 5
-
£493 GBP
View
A
Retailer 6
-
£531 GBP
View
A
Retailer 7
-
£584 GBP
View
B+
Retailer 8
-
£600 GBP
View
Most Expensive
B+
Frank Darling
2668132HK · Nov 6
£698 GBP
$939 USD
View
8 more retailers have this diamond
Prices start from £302 GBPSave up to £396 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
0.77ct Marquise
£302 GBP