Collections
Certified Gemstones
Every stone lab-certified · Direct from source · GIA, AGL, Gübelin
330 stones found

Brazil amethyst
Set of amethysts oval cut 19.59 carats, Brazil
19.59 ctovalBrazil
$882
$45/ct

Tanzania alexandrite
Alexandrite with color change cushion cut 2.54 carats, Tanzania
2.54 ctcushionTanzania
$18,131
$7,138/ct

Tanzania alexandrite
Alexandrite with color change cushion cut 1.80 carats, Tanzania
1.8 ctcushionTanzania
$4,165
$2,314/ct

Sri Lanka (Ceylon) alexandrite
Alexandrite with strong color change effect in oval cut 5.04 ct, Sri Lanka
5.04 ctovalSri Lanka (Ceylon)
$76,608
$15,200/ct
GFCO GEM (Switzerland)

Sri Lanka (Ceylon) alexandrite
Rare alexandrite in oval cut with strong color change effect 4.05 ct, Sri Lanka
4.05 ctovalSri Lanka (Ceylon)
$42,525
$10,500/ct

Sri Lanka (Ceylon) alexandrite
Alexandrite color change oval cut 1.55 carats, Sri Lanka
1.55 ctovalSri Lanka (Ceylon)
$698
$450/ct

Sri Lanka (Ceylon) alexandrite
Alexandrite color change octagon cut 2.90 carats, Sri Lanka
2.9 ctemerald (octagon)Sri Lanka (Ceylon)
$1,802
$621/ct

Sri Lanka (Ceylon) alexandrite
Alexandrite color change cushion cut 2.02 carats, Sri Lanka
2.02 ctcushionSri Lanka (Ceylon)
$3,823
$1,893/ct
GRS, GIA

Sri Lanka (Ceylon) alexandrite
Rare alexandrite with strong color change effect in cushion cut 5.21 ct, Sri Lanka
5.21 ctcushionSri Lanka (Ceylon)
$131,464
$25,233/ct
AIGS

Sri Lanka (Ceylon) alexandrite
Large color change alexandrite in oval cut 14.24 carats, Sri Lanka
14.24 ctovalSri Lanka (Ceylon)
$32,128
$2,256/ct
GIA

Sri Lanka (Ceylon) alexandrite
Color change alexandrite in cushion cut 8.07 carats, Sri Lanka
8.07 ctcushionSri Lanka (Ceylon)
$80,581
$9,985/ct
GIA

Sri Lanka sapphire
Royal Blue Sapphire Heart Shape 5.01ct
5.01 ctHeartSri Lanka
$14,780
$2,950/ct
GIA

Madagascar sapphire
Vivid Pink Sapphire Cushion Cut 4.01ct Madagascar
4.01 ctCushionMadagascar
$19,649
$4,900/ct
GRS

Namibia garnet
Mandarin Garnet Cushion Cut 3.15ct Namibia
3.15 ctCushionNamibia
$7,990
$2,537/ct
GIA

Nigeria tourmaline
Paraíba Tourmaline Oval Cut 4.02ct Nigeria
4.02 ctOvalNigeria
$71,836
$17,870/ct
SSEF

Vietnam spinel
Cobalt Blue Spinel Cushion Cut 2.80ct
2.8 ctCushionVietnam
$20,000
$7,143/ct
Gübelin

Colombia emerald
Colombian Emerald Octagon Cut 4.50ct
4.5 ctOctagonColombia
$40,260
$8,947/ct
AGL

Burma ruby
Pigeon Blood Ruby Oval Cut 3.21ct Burma
3.21 ctOvalBurma
$54,570
$17,000/ct