CaratHunter
Plans
Marquise|Natural|GIA

0.78ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2121522758

Certificate GIA 2121522758

Diamond specifications and retailer prices

From €1,166 EUR
$1,303 USD
As of October 31, 2026
Save €582 EUR (33%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €1,748 EUR at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 0.78ct natural marquise diamond

This 0.78ct natural marquise sits in the just-under-one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2121522758. Listed at 2 retailers as of October 31, 2026, with prices from €1,166 to €1,748, a €582 spread on the same certified stone. 77 Diamonds lists it at €1,748. 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

0.78
Carat
I
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2121522758
Dimensions8.77 × 5.00 × 3.01 mm
L/W Ratio1.75
Girdle conditionFaceted
Top View
8.77 mm5.00 mm0.78 ctI / SI2
OriginNatural
CutExcellent
PolishGood
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2121522758
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCuletDepth 60.2%

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: Oct 31
Current: €1,748 EUR|Low: €1,709 EUR|High: €1,756 EUR|Avg: €1,741 EUR|+1.2%
November 1, 2026
77 Diamonds€1,748 EUR

35 data points across 1 retailer

2 retailers€1,166 EUR to €1,748 EUR

B+
Cheapest Retailer
-
€1,166 EUR
$1,303 USD
Most Expensive
B
77 Diamonds
MQZMN6QDEDS · Nov 1
€1,748 EUR
£1,538 GBP
View
1 more retailer has this diamond
Prices start from €1,166 EURSave up to €582 EUR

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+
0.78ct Marquise
€1,166 EUR