How much does a 5.00ct+ natural marquise diamond cost?

As of September 2026, 5.00ct+ natural marquise diamonds range from $577 AUD/ct to $161,397 AUD/ct, with an average of $36,804 AUD/ct.

What is the price range for 5.00ct+ natural marquise diamonds?

As of September 2026, the lowest listed price is $577 AUD per carat and the highest is $161,397 AUD per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

How many 5.00ct+ natural marquise diamonds are available?

There are 659 active natural marquise listings between 5.00ct+ across 100+ retailers in the Carat Hunter index, refreshed daily.

How much can I save by comparing retailers for a 5.00ct+ natural marquise diamond?

Approximately 56% of these diamonds are available at multiple retailers, with an average price spread of 44% between the cheapest and most expensive listing of the same stone.

Natural Marquise Diamonds, 5.00ct+

Quick answer

As of September 2026, there are 659 natural marquise diamonds between 5.00ct+ listed by at least 30 retailers. A typical stone in this range costs about $220,827 AUD in total, or $36,804 AUD per carat, and most listings sit between $577 AUD and $161,397 AUD per carat. About 56% of these stones are listed by more than one retailer, and the same stone is priced 44% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is F to G SI1 at $47,225 AUD per carat across 25 listings. The same shape in lab grown form runs about $1,443 AUD per carat, roughly 96% less.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Browse 659 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$79K	$48K	$66K	$52K	$42K	$37K	$24K	$20K	-
F-G	-	$36K	$35K	$49K	$36K	$22K	$34K	$20K	$8,216
H-I	-	$22K	$23K	$28K	$18K	$18K	$24K	$17K	$7,749
J-K	-	$16K	$17K	$11K	$12K	$9,257	$12K	$11K	-
L-M	-	-	-	-	-	$12K	-	$9,379	-
N+	-	-	-	$1,383	$1,096	-	-	$6,768	-

Price by Colour & Clarity

Average price per carat for 5.00ct+ natural marquise diamonds by colour and clarity grade.

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	58	$111,183 AUD	20%
D-E	IF	18	$67,282 AUD	15%
D-E	SI1	19	$34,202 AUD	23%
D-E	SI2	19	$28,085 AUD	13%
D-E	VS1	14	$58,862 AUD	17%
D-E	VS2	62	$51,435 AUD	17%
D-E	VVS1	10	$92,821 AUD	14%
D-E	VVS2	10	$72,959 AUD	20%
F-G	I	12	$11,530 AUD	21%
F-G	IF	12	$50,889 AUD	12%
F-G	SI1	25	$47,225 AUD	23%
F-G	SI2	11	$28,621 AUD	38%
F-G	VS1	26	$50,016 AUD	44%
F-G	VS2	14	$30,501 AUD	40%
F-G	VVS1	12	$48,475 AUD	16%
F-G	VVS2	23	$68,726 AUD	21%
H-I	I	17	$10,875 AUD	63%
H-I	IF	13	$30,428 AUD	22%
H-I	SI1	10	$34,235 AUD	20%
H-I	SI2	12	$23,394 AUD	21%
H-I	VS1	10	$25,842 AUD	47%
H-I	VS2	10	$25,688 AUD	26%
H-I	VVS1	10	$32,756 AUD	7%
H-I	VVS2	11	$39,665 AUD	21%
J-K	IF	17	$21,898 AUD	26%
J-K	SI1	16	$17,306 AUD	23%
J-K	SI2	35	$15,815 AUD	38%
J-K	VS1	16	$16,858 AUD	23%
J-K	VS2	10	$12,991 AUD	114%
J-K	VVS1	10	$23,613 AUD	18%
J-K	VVS2	11	$16,070 AUD	51%
L-M	SI2	12	$13,163 AUD	31%
L-M	VS2	13	$16,717 AUD	27%
N+	SI2	12	$9,498 AUD	19%
N+	VS1	17	$1,539 AUD	649%
N+	VVS2	52	$1,941 AUD	40%

Explore by Specification

D FL D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 D SI2 E FL E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 E SI2 F FL F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 F SI2 G FL G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 G SI2 H FL H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 H SI2 I FL I IF I VVS1 I VVS2 I VS1 I VS2 I SI1 I SI2 J FL J IF J VVS1 J VVS2 J VS1 J VS2 J SI1 J SI2