Ammonites appeared during the Carboniferous period a mere 290 to 354 million years ago. Evolving during the Mesozoic era into specimens sometimes weighing more than 200 lbs., they became ubiquitous until dying out about the same time as the dinosaurs. Today the best Ammonites are found on the banks of the Volga River near the Russian city of Ulyanovsk (formerly Simbirsk). These beautiful cabochons are the result of Pyrite replacing the original bone structure of the Ammonite. There are various shades of brown, beige, black, tan, and white. Throughout many of the pieces are swirls and pockets of Pyrite drusy.
Gemstone: Pyritized Ammonite Lamberticeras sp.
Size: 32.1x43.5x8.2 mm
Weight: 76.0 ct
Cut: High Dome Cabochon
Enhancement: (A) - Doublet with two pieces of Simbercite
The goal of Bright Star Gemstones is to provide one-of-a-kind gemstones cut from hard-to-find, unique lapidary materials.
Shipping & Guarantee
Free USPS First Class shipping in the United States. All international orders are shipped using USPS International Air Mail.
All purchases are fully guaranteed. If you are not satisfied, for any reason, please return the gemstone for a full refund. Bright Star Gemstones will even pay the cost of return shipping.
100 points = 1 carat
5 carats = 1 gram
28 grams = 1 ounce
16 ounces = 1 pound
25.4 mm = 1"
Bright Star Gemstones offers free USPS shipping in the United States.
International buyers should inquire about shipping options before buying a gemstone.
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Request a cancellation within: 2 days of purchase
But please contact me if you have any problems with your order.
Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:
Please contact me if you have any problems with your order.
All gemstones purchased from Bright Star Gemstones are 100% guaranteed to meet your satisfaction. If for any reason you are not entirely satisfied, you can return the gem for a full refund of the purchase price within 14 days of receiving the package. Return the gemstone in an undamaged condition with the original shipping and packaging material. Bright Star Gemstones will even pay the cost of return shipping.
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