Mosasaurs (from Latin Mosa meaning the 'Meuse river', and Greek σαύρος sauros meaning 'lizard') are large, extinct, marine reptiles. The first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764. Mosasaurs probably evolved from semiaquatic squamates[1] known as aigialosaurs, which were more similar in...

Here's a well define polished agate slice polished on both sides with vibrant translucent hues of pink. From Brazil *Patterns may vary on piece Stock photo is shown, similar piece will be sent.

Otodus obliquus, previously known as Lamna obliqua was one of the earliest mackerel sharks. Their teeth are noted for their wide triangular crown and large side cusps (occasionally multiple side cusps). Large Otodus obliquus teeth are not easily located in the phosphate pits in Atlas Mountains of Morocco, but can...

Very tactile fossilised clam shell from Sakaraha in the Tulear province, Madagascar. These shells have been polished to give them a lovely smooth texture and highlight their colour. Jurassic, circa 165 million years old.   3 x 2.5 x 1.25 inches, 172.2 grams

Fiery labradorite cabochons set in a sterling silver necklace Handmade polished Labradorite Heart with beautiful iridescent play of colors of blue, yellow and red which is caused by internal fractures in the mineral that reflect light back and forth, dispersing it into different colors.  91.2 grams, 14 inches

Here's a well define polished agate slice polished on both sides with vibrant translucent hues of purple. From Brazil Stock photo is shown, similar piece will be sent. *Patterns may vary on piece

From Edong Mining District, Daye, Hubei, China   Large cluster of well defined scalenohedral calcite crystals partially covered with lustrous iridescent metallic chalcopyrite crystals on the surfaces. Bright and lively color of blues ,greens and reds.   5.5 x 4 x 3 inches, 1.35 lbs

From Novo Horizonte, Bahia, Brazil Gem transparent smoky quartz crystal heavily included with dozens of needle like golden yellow rutile crystals in a complex intersecting parallel formation.   4.5 x 3.5 x 2 inches, 1.9 lb s

Large formation of Agaricia agaricites, commonly known as lettuce coral or tan lettuce-leaf coral, is a species of colonial stony corals in the family Agariciidae. This coral is found in shallow waters in the tropical western Atlantic Ocean and the Caribbean Sea.   7 lbs, 17 x 14 x 7...

From Navajun, Spain Large single crystal of cubic pyrite perched atop a basalt matrix. The pyrite crystal measures 2 x 2 inches , its a perfect 3d cube with smooth metallic mirror luster faces.   7.5 lbs, 8 x 6 x 5 inches

From Moscow, Russia      A slice of a fossilized pseudomorphic ammonite that has been replaced molecule by molecule by metallic pyrite with iridescent luster on the outer surfaces with exposed chambers that are now lined with metallic pyrite crystals.    6 lbs, 10 x 9.5 x 1.5 inches

AAA Quality free form golden rutile included quartz crystals polished to a mirror finish with great transparency and color.   Weight: 890 ctSize: 4mmShape: free form Length: 21 inches Clasp: 14 kt Yellow gold

Thin plate of matrix embedded with gem transparent amethyst crystals. The amethyst crystals are fully terminated with rich deep purple amethyst crystals.   5 x 4.5 x .5 inches, 195.1 grams

Large specimen of gem transparent amethyst crystals on matrix lined with druzy quartz crystals. The amethyst crystals are fully terminated with rich deep purple amethyst crystals.   6 x 3.5 x 2 inches, 1.15 lbs

Large natural crystal of translucent gemmy ruby red corundum in white marble matrix.This beautiful specimen is from Jegdalek, Sorobi District, Kabui Prov., Afghanistan   4.5 x 4 x 2.5 inches, 2.10 lbs

Lustrous tetrahedral golden-iridescent chalcopyrite crystals, overgrown on a intersecting cluster of sharp rhombic siderite crystals. This specimen comes from the Huanggang Fe-Sn deposit, Hexigten Banner, Ulanhad League, Inner Mongolia Autonomous Region, China   5 x 5 x 1.5 inches, 2.5 lbs

Top grade natural Amethyst gemstone. Has rich lavender purple color with flawless clarity.   Weight: 65.25 ctSize: 31mm x 25mm x 15mmShape: Oval facetedOrigin: Brazil

Top grade natural Citrine gemstone has a rich golden overtone with flawless clarity.   Weight: 62.35 ctSize: 31mm x 17.5mm x 14mmShape: Emerald CutOrigin: Brazil

Exceptional clarity with natural untreated color. Weight: 314.5 ctSize: 13mm x 6mmShape: Rondelle Length: 19 inches Clasp: 14 kt White goldOrigin: India

100% natural untreated emerald beads with high quality micro faceting.Weight: 591 ctSize: 4mm x 3mm to 5mm x 3mmShape: Faceted Rondelle Length: 17 inches Clasp: 14 kt White goldOrigin: Zambia

Exceptional clarity with highly saturated apple green color. Untreated high quality micro faceting.Weight: 591 ctSize: 6mm x 5mm to 8mm x 4mmShape: Faceted Rondelle Length: 17.75 inches Clasp: 14 kt Yellow goldOrigin: India

Genuine Baltic amber necklace with gorgeous bright gem orange-red color and great clarity. Weight: 474 ctShape: raw Length: 21 inchesOrigin: Baltic Sea

From Jalgaon District, Maharashtra, IndiaElongated interconnected stalactites of translucent black druzy chalcedony on basalt matrix. The chalcedony is has a translucent colorless outline with scintillating crystal surfaces.   5.50 lbs, 9.5'' x 6.5'' x 5''

From Mina Ojuela, Mapimi, Durango, Mexico   Large limonite matrix lined with brown calcite covered with lustrous elongated translucent mimetite crystals showing rare rectangular pseudo-scalenohedral crystal formation.    3.85 lbs, 10'' x 5.5'' x 2.5''

From Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, MichiganLustrous translucent parallel scalenohedral calcite crystals with metallic copper inclusions on matrix. The copper inclusions are visible throughout the crystals.*Custom Lucite base shown included with purchase1.25 lbs, 4'' x 3.5'' x 2.5''

From Edong Mining District, Daye, Hubei, China   Large cluster of scalenohedral calcite with a secondary coating of lustrous iridescent metallic chalcopyrite crystals on the surfaces. Bright and lively specimen with a scintillating surface.   3.20 lbs, 6.5'' x 4'' x 4.75''

Dhofar 020 stony chondrites are by far the most common type of meteorite to fall to Earth: about 80% of all meteorites and over 90% of chondrites are ordinary chondrites.They contain abundant chondrules, sparse matrix (10–15% of the rock), few refractory inclusions, and variable amounts of Fe-Ni metal and troilite...

From Bou Azer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, MoroccoLustrous specimen with several cavities lined with intersecting translucent deep violet purple erythrite crystals. Beautiful color contrast with rich purple colored and a high luster, sparkles from every angle.  Crystals magnified have lightly striated faces.   3.40 lbs, 4.5'' x 4.5''...

From Mibladen, Atlas Mountains, Khénifra Province, Morocco   Here is an exceptional world class specimen of large hexagonal crystals of bright red Vanadinites on matix. Large well formed undamaged crystals, fully terminated with bright vibrant red color with highly reflective lustrous faces.   17.55 lbs, 11.5'' x 8.75'' x 5.5''

From Rio Grande do Sul, Brazil   Aesthetic cluster of colorless transparent gypsum selenite crystals on matrix with a partially coated with gradient white to purple (amethyst) quartz. The selenite crystals have water clear transparency with glassy luster faces in parallel formation, with sharp terminations.   17.55 lbs, 16.5'' x...

From Meikle Mine, Elko County, Nevada   Large rich cluster of golden yellow translucent bladed intersecting crystals of barite over calcite matrix. The barite crystals are glassy and translucent, with deep color.   10.95 lbs, 11'' x 5'' x 4''

From Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico   Sculptural stalactitic formation of sparkling snow white aragonite crystals in rounded aggregates. Shows nicely all around 360 degrees and without damage.   13.35 lbs, 12.75'' x 11'' x 5''

From Angelina copper mine, Pisco Province, Ica Department, Peru   Massive cluster of nice blocky prismatic crystals of lustrous epidote on matrix composed of green drusy epidote. The epidote crystals have pyramidal terminations with lightly striated wet luster faces. Beautiful contrasting color of black crystals against the bright green drusy...

Large specimen of 3-inch crystals of gem translucent emerald-green apophyllite with double terminations on a bed of wet luster pink stilbite crystals in parallel formation . The apophyllites are perfectly terminated with bright emerald green color and a top glassy luster, transparent at the termination. All fully terminated and damage...

From Jebel Ouichane, Beni Bou Ifrour, Nador, Nador Province, Oriental Region, MoroccoHere is a superb cluster of these incredible new blue Barites that have been discovered this past year. The crystal growth is in a radial parallel and divergent aggregates of very elongated flattened crystals with good terminations, very acute,...

From Guilin Prefecture, Guangxi Zhuang Autonomous Region, China   Aesthetic stalactitic formation of translucent tanish-orange scalenohedral calcite crystals. The calcite has a wet luster with sharp well defined surface composed of many parallel cubic crystal faces.   2.45 lbs, 10.5'' x 3'' x 2.75''

From Kelly Mine, Magdalena District, Socorro County, New Mexico   Large classic specimen of sea blue-green smithsonite in rounded aggregates on matrix. Has a high luster with vibrant translucent blue green color which is infamous from the Kelly mine. Very sought after, rare specimen due to its color and definition....

From Cerro Warihuyn, Huanuco Department, Peru   Intersecting rhombohedron crystals of transparent yellow barite on matrix. The barite crystals are thin tabular rhombohedrons with modified terminations, rich golden yellow color with glassy luster faces.   1.66 lbs, 5.5'' x 3.5'' x 2.75''   *Custom Lucite base shown included with purchase...

From Nasik District, Maharashtra, IndiaAesthetic specimen of lustrous double terminated pinkish-red Heulandite crystals in a fan shaped formation isolated on a bed of sparkling powder blue druzy chalcedony matrix.   2.70 lbs, 6'' x 5'' x 2''

From Agrigento, Sicily, Italy   Massive specimen of scintillating white aragonite covered with a cluster of gem translucent blocky bright yellow sulfur crystals.   16.85 lbs , 9'' x 7'' x 6''