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Geology @geologytime.bsky.social · 14h

Brazilian opal on matrix

Photo: Daniel Mekis Cc

#opal #gems

Geology @geologytime.bsky.social · 14h

How to Tell If a Rock Is Worth Money
When you find an unusual or eye-catching rock and wonder if it might be valuable, the first step is careful observation and testing. Many valuable finds fall into four main categories—gold, gemstones, fossils, and meteorites—
www.geologyin.com/2025/10/how-...

How to Tell If a Rock Is Worth Money – Geology In

When you find an unusual or eye-catching rock and wonder if it might be valuable, the first step is careful observation and testing. Many va...

www.geologyin.com

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Geology @geologytime.bsky.social · 15h

Malachite botryoidal, from Congo

looks like an emerald brain! what do you think?

Photo: Jimee, Jackie, Tom & Asha Cc

#minerals

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Geology @geologytime.bsky.social · 1d

Top level Tourmaline crystals, which one do you like more?

Photo: 22sGems

#minerals #gems

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Geology @geologytime.bsky.social · 3d

Iris Agate: Rainbow agate

Iris Agate is a unique type of sliced Agate that exhibits a rainbow effect when held up to the sun or a light
from Jakarta, Indonesia

Photo: Mondszcrystal.id
#gems

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Geology @geologytime.bsky.social · 4d

Gobi Agate is a distinctive rare variety of botryoidal chalcedony, characterized by its globular and often colorful formations.
www.geologyin.com/2024/06/gobi...

Gobi Agate: Unique Gemstone of the Desert – Geology In

Gobi Agate is a distinctive rare variety of botryoidal chalcedony, characterized by its globular and often colorful formations. What is Gob...

www.geologyin.com

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Geology @geologytime.bsky.social · 4d

Polished banded Turkish agate slab — from North Ankara

Photo: Ertuğ Arikan

#agate #gems

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Geology @geologytime.bsky.social · 4d

I can’t get enough of the color and clarity of this gemmy blue polished Medina Aquamarine from Brazil!

What's your go-to gemstone or favorite crystal?

Video: Eddywrapsgems
Arek Varjabedian

#minerals #crystals

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Geology @geologytime.bsky.social · 5d

MOST unusual, sharply color-zoned slice of amethyst from a bizarre stalactitic growth. This was found in India

Photo: Rob Lavinsky Cc

#minerals #crystals

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Geology @geologytime.bsky.social · 6d

Natural green Dioptase & Calcite, This stunning combo from the Tsumeb Mine in Namibia

Photo: Didier Descouens Cc

#minerals #crystals

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Geology @geologytime.bsky.social · 7d

Natural Amethyst cluster from Las Vigas, Veracruz, Mexico.

On display at the Natural History Museum of Los Angeles County, Los Angeles, California.

Photo: Eric Polk Cc

#crystals #amethyst

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Geology @geologytime.bsky.social · 7d

Native copper showing a cluster of intergrown herringbone crystals and small spinel twins. From San Agustín Mine, Corocoro, Pacajes Province, La Paz Department, Bolivia.

Photo: CarlesMillan Cc

#minerals

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Geology @geologytime.bsky.social · 7d

Welo opals are prized for their vivid play-of-color, displaying flashes of red, green, orange, yellow, and blue. Their combination of brilliance, availability, and relative affordability compared to Australian opals
www.geologyin.com/2025/10/what...

What is Welo Opal – Geology In

Welo opal (also spelled Wollo opal) is a type of precious opal mined in Ethiopia’s Wollo Province, near the town of Wegel Tena. Although sm...

www.geologyin.com

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Geology @geologytime.bsky.social · 8d

Lustrous Pyrite on Quartz
Where 'fool's gold' actually means 'I'm rich in natural beauty

Photo by: Naturalstone951

#crystals #gold

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Geology @geologytime.bsky.social · 8d

Grape agate just sitting there looking deliciously purple and edible... anyone else having to resist the urge to take a bite?

Photo: zamstone_id
Moch Zamzam
#gems #crystals

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Geology @geologytime.bsky.social · 10d

Feast your eyes on this topaz crystal from Shigar Valley, Pakistan! It’s like a dazzling gem with tons of sparkly faces, Nature’s totally flexing here.

What’s the sparkliest crystal you’ve ever seen?

Video: mfm.08/IG
Hafeez Ullah Khan
#CRYSTALS #GEMS

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Reposted by Geology

Geology @geologytime.bsky.social · 13d

Natural green Apophyllite crystals on Stilbite 💫
From Jalgoan, Maharashtra, India

Video: lostgemz
Creighton Beery

#crystals

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Reposted by Geology

Geology @geologytime.bsky.social · 15d

Extremely Gemmy Quartz from Himalayas 😍
Next level clarity..Mined at a very high altitude.
Kulu Valley, Himachal Pradesh 💚

What do you think?

Video: Pacific Minerals

#crystals #gems

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Geology @geologytime.bsky.social · 12d

Three Whale Rock (Hin Sam Wan)

The site is named for its three massive, whale-shaped sandstone boulders that rest side-by-side on a high cliff, resembling a family of whales—father, mother, and calf—emerging from a “sea” of forest.
www.geologyin.com/2025/09/thre...

Three Whale Rock (Hin Sam Wan) – Geology In

Three Whale Rock ( Hin Sam Wan ) is a spectacular sandstone formation in Phu Singh Forest Park, Bueng Kan Province, northeastern Thailand. ...

www.geologyin.com

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Geology @geologytime.bsky.social · 13d

Natural green Apophyllite crystals on Stilbite 💫
From Jalgoan, Maharashtra, India

Video: lostgemz
Creighton Beery

#crystals

11 60

Reposted by Geology

Geology @geologytime.bsky.social · 15d

Check out this natural jade (var. jadeite) from the Ruhr Museum’s Zollverein Coal Mine display in China!

Photo: Benutzer:Ra'ike Cc

#gems #jade

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Geology @geologytime.bsky.social · 15d

Extremely Gemmy Quartz from Himalayas 😍
Next level clarity..Mined at a very high altitude.
Kulu Valley, Himachal Pradesh 💚

What do you think?

Video: Pacific Minerals

#crystals #gems

6 18 75

Geology @geologytime.bsky.social · 15d

Check out this natural jade (var. jadeite) from the Ruhr Museum’s Zollverein Coal Mine display in China!

Photo: Benutzer:Ra'ike Cc

#gems #jade

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Geology @geologytime.bsky.social · 16d

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Geology @geologytime.bsky.social · 17d

Quartz is among Earth’s most abundant minerals, found in almost every rock type and in many forms—from large crystals in geodes, to glittering druzy coatings, to fine grains in sandstone. Because its appearance varies widely,: “How can I tell if a rock is quartz?”
www.geologyin.com/2025/09/how-...

How to Identify Quartz – Geology In

Learning how to identify quartz is one of the most practical skills in geology and rock collecting. Quartz is among Earth’s most abundant m...

www.geologyin.com

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