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

Fire Agate

Gemologist and author, Renee Newman unveils the rare and mesmerizing gem, Fire Agate.
Custom-made Fire Agate Ring by Richard Krukowski
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

Citrine vs. Yellow Topaz

Both are shades of sunshine and November’s birthstone. Read on to learn how these twin flames are different and alike.
a light-orange citrine mineral

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
gemstone

See Some Amazing Shows

Shop Gemstones

Shop Gemstones on Jedora

Shop Gemstones on Jedora

Shop Gemstones on JTV

Shop Gemstones on JTV

September's Birthstone: Sapphire

article

All About Sapphire: September’s Birthstone

Learn all about sapphire, the birthstone for September, including the meaning, properties, history and varieties of this gemstone.
All About Sapphire: September’s Birthstone
video

All About September's Sapphire

Adventure into the science behind the various colors of sapphire.

A man walks down a trail surrounded by beautiful sapphire gemstones in different colors.
gemopedia

Sapphire

Discover sapphire, the beautiful, popular and colorful birthstone of September!

A group of faceted and different colored sapphire gemstones.
video

1 Million Dollars in Sapphires - Most Colorful Gemstone?

See sapphire of all different colors, all around the world and over a million dollars!

Two hosts show sapphire crystals and faceted sapphire gemstones.

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