Collector Gemstones

8 products

16.72 carat natural unheated Ceylon blue sapphire from Sri Lanka, oval modified brilliant step cut, certified by GRS Gemresearch Swisslab.16.72 Carat Natural Unheated Ceylon Blue Sapphire – GRS Certified Sri Lanka - SAP16

16.72 Carat Natural Unheated Ceylon Blue Sapphire – GRS Certified Sri Lanka - SAP16

$282,201.00
$282,201.00
609.93ct Natural Color Change Alexandrite Chrysoberyl Cushion Cut GRS Award Documented World Record GemstoneNatural Alexandrite - 609.93ct Untreated Cushion Chrysoberyl, Color-Change, GRS Award Documented ALX609

Natural Alexandrite - 609.93ct Untreated Cushion Chrysoberyl, Color-Change, GRS Award Documented ALX609

$25,654,600.00
$25,654,600.00
A deep blue sapphire gemstone with brilliant faceted facets, centered on a clean white background. Unheated Srilankan

107.52ct Unheated Royal Blue Ceylon Sapphire - GRS Certified Cushion - BSAP6

$2,565,460.00
$2,565,460.00
21.53ct Natural Madagascar Ruby | GUILD Certified | Investment Gem21.53ct Natural Madagascar Ruby Oval - GUILD Certified - RUB21

21.53ct Natural Madagascar Ruby Oval - GUILD Certified - RUB21

$1,539,276.00
$1,539,276.00
55 Carat Unheated Blue Sapphire From Srilanka55.03ct Unheated Vivid Blue Sapphire | Natural Cushion Mixed Cut BSAP4

55.03ct Unheated Vivid Blue Sapphire | Natural Cushion Mixed Cut BSAP4

$1,282,729.00
$1,282,729.00
152.26 ct Sapphire — listing image 1152.26 ct Sapphire — listing image 3

152.26ct Natural Color-Change Violet Sapphire | GRS Platinum Rarity CSAP1

$8,979,110.00
$8,979,110.00
78ct GIA Certified Tanzanite78.9 ct Tanzanite — Cushion Cut — listing image 3

78.9ct GIA Certified Tanzanite | Intense Bluish Violet Cushion Cut TAZ01

$70,422.00
$70,422.00
20.53ct Unheated Blue Sapphire

20.53ct Natural Unheated Blue Sapphire Cushion Cut Srilanka SAP 01

$128,273.00
$128,273.00

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