it has been my experience that they lay outside their lay box because there is something wrong with the substrate of the lay box. yours is probably either too wet or too dry. Some eggs laid outside of the box can be saved, but my experience has been that they are infertile.. i would say that if yours is hard and abnormal looking that yours is infertile but the only way to know for sure is to incubate it until it collapses or molds.. or hatches. then you will know for sure.
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1.1 Western Painted Turtle (Mougly, Scooter)
1.1 Albino Leopard Gecko (Daphne, Guy)
1.0 High Yellow Leopard Gecko (Sunshine)
1.1 HTCT Leopard Gecko (Rocket, Dot)
0.1 SHTCT Leopard Gecko (Tequila)