Basically, a Transmitter (7-3-7) quartz crystal is two Channeler faces side by side with a triangle in between (7-3-7).
The main ‘face’ or front is actually the ‘three’ between the two seven-sided faces. The two seven-sided faces will be close to the same size.
Sometimes one of the two faces is much larger than the other. I call these Transmitter crystals with a Channeler orientation.
Transmitter (7-3-7) quartz crystal works much like Channelers, only double! They help you access higher wisdom, either in the form of your Higher Self or Spirit Guides, or even Angels.