DALLAS, TX.- An unparalleled and wholly complete Prehistoric Mammoth Tusk, measuring a bone-crushing 84 inches on the curve (est. $25,000), highlights a hand-curated selection of natural history specimens in Heritage Auctions' Nov. 3 Nature & Science Auction in Dallas.

"The tusk is absolutely suitable for the advanced collector or even for someone seeking a statement piece for their office or home," said Craig Kissick, Director of Nature & Science at Heritage Auctions. "The entire auction is filled with amazing finds like this — works of art from the Earth."

A glimmering "Gem" Ammonite from the Late Cretaceous Period is a fossilized symphony of green, purple and blue gemstone and is highly prized among collectors (est. $20,000). Additional natural formations include a significant, 14.83 troy ounce Gold Nugget from Alaska (est. $30,000) and a crystalized Copper Specimen nicknamed "Matterhorn" was discovered in Michigan's Keweenaw Peninsula (est. $10,000).

The auction's selection of large cut gemstones include a Large Tiger's Eye Sphere from Western Australia (est. $15,000); a massive, 62.465 carat Tourmaline Gemstone from Namibia (est. $15,000); A 19.53 carat Spessarite Garnet from Nigeria (est. $10,000); and a 29.35 carat Tanzanite Gemstone from Tanzania (est. $10,000).

Among the auction's extensive selection of meteorites and space rocks include an End Cut of the Admire Meteorite, discovered in Lyon County, Kansas (est. $10,000) and a 19.18-pound example of the iron Gibeon Meteorite (est. $12,000). A smooth and beautifully pitted Campo Del Cielo Meteorite found in Argentina (est. $12,000) shines in stark contrast to an olive and charcoal-hued complete individual Meteorite from the Planet Mars (est. $6,000).

Additional highlights include, but are not limited to:

• Dominican Amber with Anolis Lizard sealed inside for eternity (est. $10,000).

• A Complete Transitional Slice of Seymchan Meteorite - Contains Extraterrestrial Gemstones (est. $6,000).

• An Oligocene Era ant perfectly sealed in a specimen of translucent Amber (est. $2,000).

• Leading a selection of collectible fine minerals is a Rhodochrosite from the Sweet Home Mine in Colorado (est. $4,000).