This is one cool spider. It is commonly called the oil-can spider. Take a close look at the body and you will see why they are called this. They are not common in Dominican amber (although I would not say they are rare). There is a little confusion in terminology of this genus: it is either Lasaeola or Dipoena (family Theridiidae). The amber is small and thin.
Homoptera, Fulgoroidea - there are 2 planthoppers in this piece of Dominican amber. One planthopper is very small. In fact the small one looks as though there is a mite on one of the back legs (but upon further inspection, it is not a mite)- really cool. Finally there is a large springtail, Collembola (not shown in pictures).
Clear - perfect leaf. The leaf itself is about 1 inch in length by .5 inches in width. This is truly a beautiful piece - museum quality. This would be the shining glory in anyone's collection. It also would look great made into a pendant - the leaf is so large.........so perfect that it draws the eye to it. It is possible to find leaf parts in amber, but to find an entire leaf, well, that is just a rarity.
There are a lot of animals here, most are small but the important one is reasonable sized. That is a planthopper with all 4 wings spread. It is unusual to see all the wings like this, normally the best one can do are the 2 "front" wings. Also there is a midge, Diptera, Chironomidae, an unknown, a caddis fly, Trichoptera, a primitive fly, Nematocera,