Cabbed Septarian Nodules-Black and White 23.5mm & 18x30mm

sistersilver  

Seller's description

Sometimes I find stones that even I don't know what they are, but I got these and a couple others at the gem show because I love black and white contrasting stones. I ferreted out the name when a customer told me what they were. One cab is cut into a larger oval that measures 18x30 mm and the other is a round shape measuring 23.5mm in diameter.
Formed 50 to 70 million years ago Septarian nodules are a type of concretion where mudstone of some kind is interspersed with calcite or another carbonate-rich mineral. The calcite portions follow the pattern of radiating cracks, which occur during the unique creation of these formations. I have seem much of this material that is yellow and brown, but there is this black and white, too! It's perfect for sheik outfits and even Halloween jewelry!
I suggest using it as a pendant since calcite is fairly soft, but I know there are lots of folks who are more careful than I am. For them, something else might be more inviting. I'm sure it will look great in a silver setting.
The bottoms of the stones are unpolished.

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All reviews are from verified buyers. This review is shown automatically based on factors like recency, whether it includes comments, your chosen language, and whether the rating reflects the typical experience with the shop.

“Another beautiful piece of turquoise from Randy’s shop! Looks even better in person and arrived so fast! I will always come back for the best selection and prices for Arizona turquoise.”

Hayden

Today

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Low in stock, only 1 left

Price:CA$20.72+

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Delivery & return policies
  • Get it by
    21-26 Oct
  • Returns & exchanges
    Accepted within 14 days
  • Cost to deliver
    CA$8.58 to United States, 43215.

Seller's description

Specifications

Sometimes I find stones that even I don't know what they are, but I got these and a couple others at the gem show because I love black and white contrasting stones. I ferreted out the name when a customer told me what they were. One cab is cut into a larger oval that measures 18x30 mm and the other is a round shape measuring 23.5mm in diameter.
Formed 50 to 70 million years ago Septarian nodules are a type of concretion where mudstone of some kind is interspersed with calcite or another carbonate-rich mineral. The calcite portions follow the pattern of radiating cracks, which occur during the unique creation of these formations. I have seem much of this material that is yellow and brown, but there is this black and white, too! It's perfect for sheik outfits and even Halloween jewelry!
I suggest using it as a pendant since calcite is fairly soft, but I know there are lots of folks who are more careful than I am. For them, something else might be more inviting. I'm sure it will look great in a silver setting.
The bottoms of the stones are unpolished.

  • Sourced by
  • Use
    Supplies for making crafts
  • Materials
    Gemstone

Delivery details and policies

  • Get it by
    21-26 Oct
  • Returns and exchanges
    Accepted within 14 days.
  • Sent from
    Bisbee, AZ
  • Cost to deliver
    CA$8.58 to United States, 43215

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Meet your seller

sistersilver
sistersilver ·

Arizona, United States

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 5.0
·
24.8k sales
·
18 years on Etsy
Randy Thill Jason Paschke Sherrie Reed Annie Moureaux
4 shop members

Usually responds in a few hours

Smooth dispatch Has a history of dispatching on time with tracking.

Speedy replies Has a history of replying to messages quickly.

Rave reviews Average review rating is 4.8 or higher.

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Listed on 25 Jun, 2026