All Specimens

The principal member of the Aragonite Group, aragonite is the second most common polymorph of natural calcium carbonate (the most common is calcite). It is significantly less widespread and abundant than calcite and is formed under a much narrower range of physiochemical conditions. It is metastable relative to calcite and often converts to calcite accompanying changes in the environment. It is nearly always a low-temperature, near surface mineral.

Name: Aragonite Sphere
Dimensions: 104 mm - 4.1 inches
Weight: 1.71 kg - 3 lbs 23 oz
Origin:  China

Product Type: Smoky Quartz
Approx Weight (per piece): 9.6ct
Size: 19x13mm
Shape: Modified Hexagon Cut
Color: Dark Smoky Color
Clarity:  Clean to the eye
Origin:  Brazil

Product Type: Smoky Quartz
Approx Weight (per piece): 11.73ct
Size: 20x13.5mm
Shape: Modified Hexagon Cut
Color: Dark Smoky Color
Clarity:  Clean to the eye
Origin:   Brazil

Product Type: Smoky Quartz
Approx Weight (per piece): 13ct
Size: 19.5x14mm
Shape: Modified Octagon Cut
Color: Dark Smoky Color
Clarity:  Clean
Origin:  Brazil

Product Type: Smoky Quartz
Approx Weight (per piece): 18.27ct
Size: 22x16.3mm
Shape: Modified Octagon Cut
Color: Dark Smoky Color
Clarity: Clean to the eye
Origin: Brazil

Product Type: Smoky Quartz
Approx Weight (per piece): 11.2ct
Size: 15.5mm
Shape: Octagon Cut
Color: Dark Smoky Color
Clarity:  Clean to the eye
Origin:  Brazil

This is a must have 26.7 gram Impact Melt Rock from the Dellen Crater, north of Stokholm, Sweden. Some locals call these rocks by the name of “dellenites”, although officially they are impact melt rocks.  Although not a meteorite, impactites are directly linked to them and their impacts and are probably going to be one of the rarest collection items you'll ever own. Impactite is a slag-like glassy object found on the surface of the earth, formed from rock melted by the impact of a meteorite.

The term impactite encompasses shock-metamorphosed target rocks, melts or suevites and mixtures of the two, as well as sedimentary rocks with significant impact-derived components and shocked mineral grains, tektites, anomalous geochemical signatures, etc.

This impactite was formed approx. 89 million years ago when a meteorite crashed into the earth making a round crater which is now a lake about 11 miles wide.  Dellen impactites were divided into three impactite groups: (i) suevitic impact breccias with lithic and melt clasts, (ii) impact melt rocks, and (iii) shocked (parautochthonous) target rock. In turn, impact melt rocks were divided into (i) clast-rich, (ii) clast-poor, and (iii) clast-free types.  The Dellenite type material was classified as clast poor impact melt breccia.

This gorgeous slice displays very well.  It is amazingly light considering its mass of 70x32x8   mm.  Would be a beautiful addition to any new or existing collection. Comes with a Canagem Collection specimen card.