Garnet is a bright magenta.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Dry time: 15 seconds-this ink actually dried pretty fast for how wet the flow is.
Water resistance: Low
Show through: Medium
On 20 pound copy paper there was a little bit of feathering but other than that the ink behaved well.
Ink swabs for comparison, left to right (top to bottom for mobile RSS): Diamine Deep Magenta, Monteverde Garnet, and Callifolio Andrinople. Right now I think I like Garnet better than Andrinople, just because it has a wetter flow.
I used a medium Pelikan M605 White Transparent on Tomoe River paper. The ink had a slightly wet flow. I loved this pen/paper/ink combo.
Overall, I really enjoyed this ink. I'm pretty sure I need a bottle. I love the flow, the color and the shading, so for me it's a winner. Give it a try, you might love it.
Disclaimer: I purchased this ink myself and all photos and opinions are my own. There are no affiliate links on this page.