I decided to try some of FrankMatthews Ketamine due the good price and my assumption that the Dutch market was flooded with what appeared to be the same batch. Regardless of the good reviews and FrankMatthews mention that it is labtested I'm pretty certain it is either not Ketamine or heavily cut.
I performed two mandelin reagent tests and the results are not consistent with Ketamine. It turned from yellow with some smoke and fizzing to light green. The results appear consistent with Methoxetamine but it is hard to say definitely. I'm familiar with Methoxetamine and the product does look similar e.g. smaller blocky chunks mixed with powder/fine crystals. In terms of taste it is also different from my experiences with Ketamine.
Where are you based? If it's the UK then send a sample to Wedinos.