This is a sample kit from Mega Marbles in 2001.  These are extremely rare.  They also made a few configurations with marbles.  This one is for the decorator gems and marbles they carried.  The plastic box measures approximately 8 inches by 4 inches by 1 inch high.  The gems and marbles are certainly not all in the correct place.  That will be the fun of the new owner to figure out the exact proper location for each sample.  The true Mega Marbles collector will appreciate the rarity of this item.  There is one piece of plastic tab that broke off but has been repaired and is not noticeable unless mentioned.