Skip to main content
Video Loading
Want more images or videos?
Request additional images or videos from the seller
1 of 19

Exceptional “Excalibur” Amethyst Formation, Calcite, Agate, Quartz

$75,000
£57,260.48
€65,583.30
CA$105,074.66
A$117,486.33
CHF 61,626.49
MX$1,423,041.53
NOK 777,913.20
SEK 734,940.01
DKK 489,514.32

About the Item

With its extremely unusual central amethyst epimorph after calcite, this natural wonder evokes images of the legendary sword, Excalibur, magically fixed in the stone. Elsewhere we see quartz-frosted calcite, goethite and amethystine quartz. An extraordinary specimen. This piece was legally and ethically sourced directly in the prestigious mines of Uruguay, South America. Uruguayan amethyst is internationally recognized as being the finest and most aesthetic amethyst in the world, due to its intense deep purple coloration, the large size of its peaked crystals, and its durability. These crystals were formed over 120-140 million years during the Cretaceous period, and as all of our pieces are formed naturally, they are completely unique and unrepeatable natural wonders of art.
  • Dimensions:
    Height: 33.47 in (85 cm)Width: 18.9 in (48 cm)Depth: 14.57 in (37 cm)
  • Materials and Techniques:
  • Place of Origin:
  • Period:
  • Date of Manufacture:
    120-140 Million Years
  • Condition:
  • Seller Location:
    London, GB
  • Reference Number:
    Seller: Stock No. 5701stDibs: LU5394227627392

More From This Seller

View All
Half Polished Amethyst Geode with Agate Border and Calcite Formation
Located in London, GB
A half polished geode with a thick agatised border. The inside covered by deep purple amethyst crystals and 2 beautiful calcite formations at the centre, one of them covered with a b...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

Deep Purple Amethyst with Calcite and Polished Agate
Located in London, GB
Stunning geode cluster of an intense deep purple colour amethyst crystals. A big calcite stand-out from the crystals, covered with a blanket of black hematite. This piece was lega...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

Amethyst Cluster with Stalactite Formations and Calcite Crystals
Located in London, GB
An exquisite and rare amethyst cluster with stalactite formations and calcite crystals. The stunning piece’s shape resembles a “Cascade” or “waterfa...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

Amethyst Geode with Several Mineral Crystal Formations Inside
Located in London, GB
Resembling an infinity sign, this whole geode is a stunning and rich piece, full of mineralogical information. The outer layer is basalt, the interior amethyst crystals, and at the h...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

Large amethyst chapel with calcite and stalactites
Located in London, GB
Another large amethyst chapel, the corresponding half of the original geode, showing deep purple amethyst crystals punctuated with small stalacti...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

Double Windowed Amethyst Geode with Agatised Borders and Rare Calcite Formation
Located in London, GB
The central element of this geode has been preserved with two windows on each side, revealing gorgeous calcite formations sat on a blanket of differentially tinted amethystine quar...
Category

Antique 15th Century and Earlier Uruguayan Natural Specimens

Materials

Agate, Amethyst, Quartz

You May Also Like

Rare, World-Class Calcite in Intact Amethyst Geode, A Natural Masterpiece
Located in Ametista Do Sul, BR
In a world where Amethyst Geodes are quite common, this geode stands out as being far from ordinary. The calcite is gallery-worthy, showing beautiful aesthetics and an intact nature....
Category

2010s Brazilian Natural Specimens

Materials

Agate, Amethyst, Crystal, Rock Crystal

Gem grade, Amethyst Geode Sculpture
Located in Los Angeles, CA
Gem grade, Amethyst Geode Sculpture The amethyst geodes from Uruguay are mined from the same rock formation as their relatives just to the north across...
Category

Antique 15th Century and Earlier Uruguayan Organic Modern Natural Specimens

Materials

Amethyst, Rock Crystal

Large Crystal, Amethyst Geode Specimen
Located in New York, NY
A large geode crystal specimen featuring an amethyst center.
Category

21st Century and Contemporary Brazilian Organic Modern Natural Specimens

Materials

Crystal

Amethyst Geode
Located in East Hampton, NY
Large beautiful amethyst geode.
Category

Mid-20th Century Natural Specimens

Materials

Amethyst

Rare Amethyst Geode with Lavender Amethyst and Landscaped Polished Back
Located in Ametista Do Sul, BR
Special Large Lavender Amethyst Geode with Gorgeous Blue Agate Polished Back ▫️ Description An Amethyst Geode, beautiful from both front and back, showcases aesthetically pleasing ...
Category

2010s Brazilian Natural Specimens

Materials

Agate, Amethyst, Crystal, Rock Crystal

Purple Amethyst & Calcite Mineral Specimen, Artigas, Uruguay
Located in Edison, NJ
Artigas is known for amethysts of the darkest and richest hues of purple. Lustrous and richly-toned, they are instantly recognizable and not uncommon in the mineral market. What sets...
Category

Antique 15th Century and Earlier Brazilian Natural Specimens

Materials

Amethyst, Multi-gemstone, Quartz, Rock Crystal