Some Ipe can be hard to read the grain, but almost all the Ipe I buy will look like normal boards. It's not ring porous. Often the black boards can be the hardest to read since the ring lines are black as well.. This is usually the heaviest Ipe.
I take the board outside in the sun and rub the edges with a wet cloth to highlight what grain there is.. Also if the face of the board is smooth its probably has very little violation or irregular grain as the planer will leave rough spots marking these irregularities.
I past out a few sticks of it at Mojam to guys who couldn't understand why I use Ipe since its so soft..and I find they got it from someone whose motive is to sell osage/cookie cutter bows..I put a stick of Ipe in their hands and they were saying..Whats this?
Don't always believe its Ipe, until the green sawdust burns your nose, and it sinks like a rock in the pool...