CRYSTAL TWINNING
Rock&Gem Magazine|July 2020
Examining the Attributes of Various Twin Forms
BOB JONES
CRYSTAL TWINNING

We collect minerals for many reasons, both scientific and aesthetic, whether they are crystallized or massive. We admire crystal groups, single crystals, and their beauty as creations of nature. By and large, we collect and display specimens dominated by groups of a particular mineral species, sometimes accompanied by other species. Such clusters of minerals are called an aggregate of crystals. Under the right circumstances and within those aggregate mineral groups are three general forms of crystals that exhibit twinning.

Denne historien er fra July 2020-utgaven av Rock&Gem Magazine.

Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.

Denne historien er fra July 2020-utgaven av Rock&Gem Magazine.

Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.

FLERE HISTORIER FRA ROCK&GEM MAGAZINESe alt
Rockhounding Ohio's Lake Erie Islands
Rock&Gem Magazine

Rockhounding Ohio's Lake Erie Islands

A short ferry boat ride three miles from Ohio’s Lake Erie coastline is South Bass Island, better known as Put-in-Bay or the “Key West of the North.”

time-read
4 mins  |
Rockhound Roadtrip 2024
Iowa's Hidden Treasures
Rock&Gem Magazine

Iowa's Hidden Treasures

Exploring Keokuk Geodes: How They're Made & What's Inside

time-read
5 mins  |
Rockhound Roadtrip 2024
Agatized CORAL
Rock&Gem Magazine

Agatized CORAL

Florida's Collectible State Stone

time-read
3 mins  |
Rockhound Roadtrip 2024
Rockhounding Florida's Beaches
Rock&Gem Magazine

Rockhounding Florida's Beaches

Beachcombing serene stretches of Florida can reveal fascinating finds like fossilized shark teeth, sea glass, quartz, agate and even coral fragments.

time-read
6 mins  |
Rockhound Roadtrip 2024
Collecting Staurolite
Rock&Gem Magazine

Collecting Staurolite

Hot Spots In Virginia & Georgia

time-read
3 mins  |
Rockhound Roadtrip 2024
Pecos Valley Diamonds
Rock&Gem Magazine

Pecos Valley Diamonds

New Mexico's Ancient Attraction

time-read
4 mins  |
Rockhound Roadtrip 2024
12 Tips for Rockhounding Tucson's Greatest Shows
Rock&Gem Magazine

12 Tips for Rockhounding Tucson's Greatest Shows

Tucson in February becomes the international hub for buying and selling colored gems, rocks, minerals and fossils.

time-read
4 mins  |
Rockhound Roadtrip 2024
Turquoise in the American Southwest
Rock&Gem Magazine

Turquoise in the American Southwest

A Water & Sky Souvenir

time-read
4 mins  |
Rockhound Roadtrip 2024
Touring Colorado's MINERAL BELT
Rock&Gem Magazine

Touring Colorado's MINERAL BELT

It's a Showcase of Mining History & Minerals

time-read
6 mins  |
Rockhound Roadtrip 2024
Geology &Colorado's Taurish Traiks
Rock&Gem Magazine

Geology &Colorado's Taurish Traiks

Most of Colorado’s tourist trains today were originally constructed in the late 1800s to serve the state’s lucrative mining operations.

time-read
4 mins  |
Rockhound Roadtrip 2024