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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

VG • I/SI2 • GIA 1437394970

Certificate GIA 1437394970

Diamond specifications and retailer prices

From £309 GBP
$415 USD
As of October 31, 2026
Save £347 GBP (53%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £656 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.5ct natural marquise diamond

This 0.5ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1437394970. Listed at 5 retailers as of October 31, 2026, with prices from £309 to £656, a £347 spread on the same certified stone. 77 Diamonds lists it at £656. 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

0.50
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1437394970
Dimensions7.45 × 4.19 × 2.60 mm
L/W Ratio1.78
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp
Top View
7.45 mm4.19 mm0.50 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1437394970
Side View
Table 65.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 61.9%

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: £656 GBP|Low: £281 GBP|High: £672 GBP|Avg: £523 GBP|+1.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 2£309 GBP
Retailer 3£460 GBP
77 Diamonds£656 GBP
Retailer 4£672 GBP

30 data points across 4 retailers

5 retailers£309 GBP to £656 GBP

A
Cheapest Retailer
-
£309 GBP
$415 USD
Final sale: no returns
B+
Retailer 2
-
£421 GBP
$565 USD
View
B+
Retailer 3
-
£460 GBP
$617 USD
View
B
Retailer 4
-
£531 GBP
$713 USD
View
Most Expensive
B
77 Diamonds
MQMBMNHYFSDE · Nov 2
£656 GBP
View
4 more retailers have this diamond
Prices start from £309 GBPSave up to £347 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
0.50ct Marquise
£309 GBP