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Marquise|Natural|GIA

0.91ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 1545694495

Certificate GIA 1545694495

Diamond specifications and retailer prices

From £1,137 GBP
$1,526 USD
As of November 1, 2026
Save £234 GBP (17%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,371 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 0.91ct natural marquise diamond

This 0.91ct natural marquise sits in the just-under-one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1545694495. Listed at 5 retailers as of October 31, 2026, with prices from £1,137 to £1,371, a £234 spread on the same certified stone. Blue Nile lists it at £1,371. 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

0.91
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1545694495
Dimensions9.65 × 5.18 × 3.22 mm
L/W Ratio1.86
Culet sizeNone
Key to symbols
Cloud, Feather
Top View
9.65 mm5.18 mm0.91 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1545694495
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.2%

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 1
Current: £1,371 GBP|Low: £992 GBP|High: £1,507 GBP|Avg: £1,247 GBP|-9.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 3£1,137 GBP
Retailer 4£1,139 GBP
Retailer 2£1,247 GBP
Retailer 5£1,282 GBP
Blue Nile£1,371 GBP

38 data points across 5 retailers

5 retailers£1,137 GBP to £1,371 GBP

A
Cheapest Retailer
-
£1,137 GBP
$1,526 USD
B+
Retailer 2
-
£1,139 GBP
$1,528 USD
View
Final sale: no returns
B+
Retailer 3
-
£1,247 GBP
View
B+
Retailer 4
-
£1,282 GBP
SGD 2,324 SGD
View
Most Expensive
B+
Blue Nile
28348353 · Oct 31
£1,371 GBP
$1,840 USD
View
4 more retailers have this diamond
Prices start from £1,137 GBPSave up to £234 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
0.91ct Marquise
£1,137 GBP