My thanks to Ana of Well Appointed Desk for the ink sample.
Rose Quartz is a very odd and unique ink. It’s pastel grey-red colour. It goes down more grey than red but eventually drying to a rose colour. It isn’t very bright. It is a shading ink but objectively it is really hard to read against white paper. This is an ink that works best with a wetter ink. Right now this isn’t an ink that is suitable for day to day writing. It feels like it is being undone for the sale of being unique. Personally, I am not a fan.