I met Jaroslav Hyrsl during the Antwerp Mineral Show / Belgium. As you know he is the author of the magnificent book Peru-Paradise of Minerals, and asked him the correct location of the Quartz, Dravite, Anatase specimens which came on the market in 2004. He told me that the specimens occurs in Alpine-type fissures and came from the vicinity (backside) of Pastoruri Mountain, near the Pucarrajo Mine, Bolognesi Province, Ancash Department, Peru." and had been described in his book. Conclusion, both specimens with photo ID.117330 and 293130 are not from " Huallanca District, Dos de Mayo Province, or near the Huanzala Mine, as mentioned but from Pastoruri Mt.
Ref.: - Jaroslav Hyrsl, Jack A.Crowley, Rock H.Currier, Terry Szenics.(2011): PERU - PARADISE OF MINERALS.544pp. / Pastoruri Mt. page 164)