The River Stone collection

A more discerning
standard for diamonds.

We personally review the details that matter: grade, proportions, media, growth method and availability, before a stone enters this collection.

A considered selection of CVD and HPHT lab-grown diamonds, including fancy colors, with final availability and order details confirmed before any order is finalized.

Explore our guides: loose IGI-certified diamonds · IGI certificate lookup · fancy-color diamonds · colored-diamond pricing.

Looking for several stones? Ask the Diamond Concierge for different shapes and carat weights in one request—for example, a 1.5 ct round, a 2 ct pear and a 3 ct emerald. Available matches appear together on one results page.

Screened collection

Explore selected diamonds

Showing all 5,089 matching diamonds.

Refine the viewReturn to RSD SelectionShow considered shortlist

How RSD Selection worksWe begin with a curated shortlist. Every diamond shown passes our IGI, media, availability, growth-method and finish screens. Colorless stones stay within our stricter fluorescence screen; fancy-color stones retain the fluorescence grade reported on the certificate, including when it is not reported. RSD Selection places the strongest screened profiles first; it is a considered starting point—not a claim that one diamond is universally best.

Selected Marquise Step Cuts

15 shown

RSD Selection Shown first for its screened grade profile

IGI report LG826614925

RSD-2B2ACF7B4971

4.07 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,999$491/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG826614925

IGI report LG818623126

RSD-299D1AFBF4D1

3.47 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,499$432/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG818623126

IGI report LG830602967

RSD-756299C21A48

3.25 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,499$461/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG830602967

IGI report LG830602893

RSD-FF64458F85AF

3.20 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,499$468/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG830602893

IGI report LG826667971

RSD-78077542F6E7

3.17 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,399$441/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG826667971

IGI report LG826641170

RSD-E6A565F4D958

3.13 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,399$447/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG826641170

IGI report LG821610791

RSD-CAE0714D2BD8

2.59 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,099$424/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG821610791

IGI report LG830603075

RSD-F5B6544BA02F

2.55 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,099$431/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG830603075

IGI report LG828673150

RSD-F70C0B13D577

2.07 ct Marquise Step Cut

F colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$899$434/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG828673150

IGI report LG828641839

RSD-FA8D6A05925A

4.27 ct Marquise Step Cut

F colorVS1 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$2,099$492/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG828641839

IGI report LG830635112

RSD-63D9475A0BCE

3.10 ct Marquise Step Cut

F colorVS1 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$1,399$451/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG830635112

IGI report LG826640775

RSD-CD6343268559

2.16 ct Marquise Step Cut

F colorVS1 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$949$439/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG826640775

IGI report LG826614924

RSD-70E46FC5F464

2.12 ct Marquise Step Cut

F colorVS1 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$899$424/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG826614924

IGI report LG837637815

RSD-4C8B75935DD3

4.08 ct Marquise Step Cut

Fancy Brown colorVVS2 clarityIGICVD

RSD Selection ScoreEvidence incompleteReview the detail page for the missing fields.

$2,299$563/ctCurrent price. No artificial markdowns.Availability confirmed before any order.

Preview IGI report LG837637815

IGI report LG837637814

RSD-82C498582587