古生物化石，地質學專業術語，指是人類史前地質歷史時期形成并賦存于地層中的生物遺體和活動遺跡，包括植物、無脊椎動物、脊椎動物等化石及其遺跡化石。
古生物化石不同于文物，它是重要的地質遺跡，是我國寶貴的、不可再生的自然遺產。我國是古生物化石比較發育的國家之一，幾乎遍及全國各地。特別是近年來先后發現的河南南陽、湖北鄖陽、內蒙古二連恐龍蛋及骨骼化石，遼西的鳥化石，云南澄江動物群化石、山東山旺動、植物等珍稀的古生物化石，受到國際上特別是科學界的廣泛青睞。
目前，全球的蛋化石的總量也就幾千枚，禽類蛋化石甚至更少。在這些幾乎找尋不到的蛋化石中，90%的外表均以單個形式存在，禽類蛋化石是世界罕見的古生物遺跡，也是國家文物館非常稀缺的化石珍寶，具有很大的文物收藏價值和歷史考古價值。可以說禽類蛋化石是無價之寶，它們是在地球生存1億6千萬年的證據，其形成條件可是非常困難，經過一個又一個時代的變化，以及底殼運轉，仍能保存完好的禽類蛋化石，價值千萬無疑。
下圖有幸見到的一枚蛋化石，從外觀上看似橢圓形的赤褐色石頭，蛋外面有一層黃土包裹，深赤褐，性脆，粉砂巖狀，體態極為自然，猶如地球表面，觀賞性極佳，且極具研究。
Paleontological fossils, a term used in geology, refer to the biological remains and active relics formed and deposited in the stratum during the prehistoric geological period of mankind, including fossils of plants, invertebrates, vertebrates and their remains.
Paleontological fossils are different from cultural relics. They are important geological relics and valuable and non-renewable natural heritage in China. China is one of the countries where paleontological fossils are relatively developed, almost all over the country. Especially in recent years, Nanyang, Yunyang, Inner Mongolia, Erlian dinosaur eggs and skeleton fossils, bird fossils in Western Liaoning, Chengjiang fauna fossils in Yunnan, Shanwang fauna and plants in Shandong and other rare paleontological fossils have been found successively, which are widely favored by the international community, especially the scientific community.
At present, there are thousands of egg fossils in the world, and even fewer egg fossils in poultry. Among these almost untraceable fossils, 90% of the exteriors are in a single form. Poultry egg fossils are rare paleontological relics in the world and rare fossil treasures in the National Heritage Museum. They have great value in cultural relics collection and historical archaeology. It can be said that fowl egg fossils are priceless treasures. They are the evidence of 160 million years of existence on the earth. Their formation conditions are very difficult. After the changes of times and the operation of the bottom shell, the fowl egg fossils can still be well preserved, which are of great value.
The egg fossil in the picture below is an oval-shaped reddish-brown stone. It is surrounded by a layer of loess. It is dark reddish-brown, brittle and siltstone. It has a very natural shape, just like the earth's surface. It is very ornamental and very research-oriented.
隨著收藏市場的活躍，這些化石不僅僅是科學研究領域的實物證據，很多具有極高的美學欣賞價值和收藏價值的化石，已成為一種收藏資源，出現了化石收藏熱。化石在整個收藏界的成交也是有一個新的突破，有著一個新的高度。 2002年在英國倫敦一場拍賣會上一枚圓形恐龍蛋化石18萬美元起拍，經過9次競價，最終以128萬美元（相當于809萬人民幣）的價格落錘成交。 拍賣市場上的各種單個動物化石真品價值不菲，這種古物的價值，還會隨著時間的演變而變得更具價值，故在收藏品市場上，蛋化石千金難求。
With the active collection market, these fossils are not only physical evidence in the field of scientific research, but also many fossils with high aesthetic appreciation value and collection value, which have become a kind of collection resources and fossil collection fever. There is also a new breakthrough in the trade of fossils in the whole collection circle, with a new height. A round dinosaur egg fossil was sold for $180,000 at an auction in London in 2002. After nine bids, it was finally sold for $1.28 million (equivalent to 8.09 million RMB). The authentic individual animal fossils on the auction market are of great value, and the value of this kind of antique will become more valuable with the evolution of time. Therefore, in the collection market, egg fossils are hard to find.
