Fibrous - Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos).
Habit:
Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Habit:
Twinning Common - Crystals are usually twinned.
Luster:
Sub Metallic
Streak:
greenish black
Optical Properties of Doloresite
Gladstone-Dale:
CI meas= 0.294 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.323 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2616,KPDmeas= 0.2727,KC= 0.3863 Ncalc = 2.26 - 2.33
Optical Data:
Biaxial (?), b=1.9
RL Anisotrophism:
Strong.
RL Color:
Gray with color variation along crystals.
Calculated Properties of Doloresite
Electron Density:
Bulk Density (Electron Density)=3.17 gm/cc note: Specific Gravity of Doloresite =3.30 gm/cc.
Fermion Index:
Fermion Index = 0.0015590712 Boson Index = 0.9984409288
Photoelectric:
PEDoloresite = 10.26 barns/electron U=PEDoloresite x rElectron Density= 32.57 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Doloresite is Not Radioactive
Chemical Formula: 
