A variety of gemstones and mineral specimens

Discover the World of Gemstones

From loose gemstones to mineral specimens, expand your gemological education and explore your own gemstone journey.

article

What is the Mohs Hardness Scale?

The hardness of gem materials is an important measurement we can easily understand through the Mohs Hardness Scale. Austrian geologist and mineralogist, Friedrich Mohs, created this standard comparison of the hardness of one gem material against another 200 years ago.
What is the Mohs Hardness Scale?

Latest Articles

article

Moissanite vs. Diamond

Learn and compare moissanite and diamond, two beloved gemstones that often compete for the same admiring glances.
A polished and faceted diamond is positioned in front and to the left of a polished and faceted moissanite gemstone.
article

All About Kunzite

Explore the story of kunzite, a precious pink gemstone of peace and love.
a polished and faceted pinkish-purple kunzite gemstone
article

The Loupe: The Best Tool to Look at Gems

Look at a loupe and learn all about its optical and interesting qualities.
A gemologist loupe is placed near a dark blue polished and faceted gemstone.

Tune in for Gemstone Live Streams on JTV Extra

Join in and watch Gem Discoveries on Sundays at 10 a.m. Eastern Time and Mondays at noon EST on JTV. Join Tom Joyce on JTV Extra one hour before the show for exclusive sneak peeks.

Watch Gem Discoveries
gemstones image

See Some Amazing Shows

Shop Gemstones

Shop Gemstones on Jedora

Shop Gemstones on Jedora

Shop Gemstones on JTV

Shop Gemstones on JTV

May's Birthstone - Emerald

article

All About Emerald: May's Birthstone

Learn all about emerald, the birthstone for May, including the meaning, properties, history and more.
All About Emerald: May's Birthstone
video

Unboxing Emeralds: Gemologist vs. Geologist

Learn the gemology and geology of May's Birthstone, emerald, and see beautiful specimens!

A gemologist and geologist observe a polished and faceted emerald gemstone.
gemopedia

Emerald

Learn all about emerald, May's beloved birthstone!

polished and faceted emerald gemstone
video

All About Emerald Inclusions

Take a close-up look at the many fantastic emerald inclusions!

a group of different emerald specimens with gemstone inclusions

Featured Videos

video

Unboxing 10 Stunning Red Gemstones: Ruby, Spinel and Garnet

Delve deep into the world of these spectacular red gemstones and learn their stories!
Unboxing 10 Stunning Red Gemstones: Ruby, Spinel and Garnet

Cutting Into A HUGE Amethyst Geode!

On today's episode, we're opening our biggest geode yet! It's an Amethyst Cathedral from Brazil & we find a lot more than we bargained for! Watch as we reveal the amazing crystals inside & learn how these natural wonders get their shape.
geode

All About Black Diamonds

Black Diamonds fascinate us! Rob, your host, wants to take you deep into the world of these spectacular gems!  Ever wonder how these diamonds, and other colored diamonds, get their beautiful hues? Check in to watch just how these Black Diamonds come into being and more!
All About Black Diamonds

Unboxing $3,000,000 in Gemstones | Paraiba Tourmaline & More

Watch our most expensive unboxing!

Unboxing $3,000,000 in Gemstones | Paraiba Tourmaline & More

All About Dream Stones & Gems in Dreams

Discover the History & Lore of "Dreamstones"!

All About Dream Stones & Gems in Dreams

History of Gemstones

article

Gemstone History

Gemstone collecting has a history dating back to the travels of Marco Polo. Discover the tales that led to the popular past time of collecting gemstones.
Gemstone History
article

Gemstone Origins

Discover the breathtaking gemstone properties that have captured man's imagination for thousands of years.
Gemstone Origins

Explore Articles

Gemstone Education

article

Gemstone Weight vs. Gemstone Size

Discover the difference between gemstone weight and gemstone size.
Gemstone Weight vs. Gemstone Size
article

Phenomenal Gemstones and Optical Properties

Phenomenal gemstones exhibit unique and stunning optical characteristics like cat's-eyes, color change and more.
Phenomenal Gemstones and Optical Properties
article

Diamond Grading: the Four Cs

Investigate the 4 Cs of diamond grading, diamond carat weight, diamond clarity, diamond color and diamond cut to help you buy the best diamond for you.
Diamond Grading: the Four Cs
article

Gemstone Identification: How to Identify Gemstones

Discover how to identify gemstones with this gemstone identification guide.
Gemstone Identification: How to Identify Gemstones

Gemstone Discovery App

showcase

Build a Customized Gemstone Collection

Create, upload and organize your very own gemstone catalog anywhere and anytime with this easy-to-use and unique app experience.

gemstone discovery app on mobile smartphone

Gemopedia

gemopedia

Did You Know?

Learn about amber, the ancient fossilized resin of trees that grew in forests millions of years ago. Research indicates that amber ranges from about two million to 360 million years in age.
amber with bug