Spent some time hacking away at the tea brick and discovered nope, it IS green tea. So once I had enough, and the water in the boiler had cooled to the right temp for green tea, I loaded the powder and chunks into the IngenuiTEA, and set it brewing. Yup, definitely green tea. And...not good, IMO. Tastes like overcooked green vegetables. Sugar just made it taste like sweet overcooked vegetables. I hit that flavor from a lot of green teas, which makes me think I just can't handle green teas. A little more on the brick. In my searching yesterday, I learned that these types of bricks are often made of lower quality, powdered tea leaves and stems. It's super compressed, like tablet candy (SweeTarts, Bottle Caps, Smarties) but a lot harder. A knife barely touched it. The cleaver and a hammer barely touched it. I ended up getting my hacksaw-like cheap serrated knife and sawing away at it. These bricks are often sold at historical reenactment places, even though bricks like this weren't imported into the US until 2000 or so. Most sites I saw that asked about them, the asker was advised, "just use it as a decorative novelty." I think I'll stick with loose leaf tea.