00:40

Aquamarine Rough Crystal Surface

09:00

Methane gas bubble slowly shrinks and expands rapidly

01:24

Making a methane gas bubble in petroleum quartz disappear and reappear

00:15

Petroleum in Quartz from Pakistan

01:11

Petroleum in quartz under UVLW light

01:39

Perfect Smokey Quartz Crystal

00:55

Star sapphire

00:49

Copper platelets in Oregon Sunstone

00:10

John Dyer Gemstones. Ametrine

00:11

John Dyer Gems

00:35

spessartite in quartz

00:33

Sphalerite in Quartz

00:57

Ajoite in Quartz

00:52

Dumortierite in Quartz

00:10

optic flares and shine after effects test/fun

00:10

Lucas Fassari Gem Photography

00:23

Spessartite inclusions in Quartz

04:36

Heating Petroleum Quartz from Pakistan

01:25

Goethite in Amethyst/Quartz

05:45

Synthetic Quartz Crystal

00:24

Contra Luz Opal

01:53

Contra Luz Opal

01:28

"Contra Luz" Natural Opal

08:32

Inclusions you might find in a Ruby

04:36

Lattice Diffused Corundum heat treated with elements present

02:48

Synthetic Quartz-A Huge Problem

03:23

Synthetic Quartz, varieties amethyst and citrine

02:06

"Star Garnet". garnet displaying asterism (with six rays).

01:17

Rock Crystal Quartz Petroleum Quartz

02:50

Synthetic Ruby made by the Flux process

00:20

Just over 20 carats. Sphalerite

00:19

Swiss Blue Topaz cut by John Dyer

00:21

Swiss blue topaz cut by John Dyer

02:59

Synthetic Sapphire via Flame Fusion process

03:45

Imitation emerald not synthetic emerald

00:28

John Dyer cut topaz

00:29

scapolite

00:35

3.42 carat Jeremejevite