![]() | near Shelton, Washington |
![]() |
|
| NaAlSi2O6 . H2O
- Small colorless trapezohedrons line some amygdules. Transparent crystals turn opaque when removed from the ground due to dehydration.
|
(K,Na)Ca4Si8O20(F,OH) - 8H2O
- Translucent crystals to 1". Small crystals appear cubic due to absence or pyramidal faces. Crystals turn opaque white due to dehydration.
| CaCO3
- Beautiful tea colored rhombohedral crystals, some twinned, are found in vugs associated with natrolite or analcime. | (Mg,Fe)3(Si,Al)4(Mg,Fe)3O10(OH)8
- Massive chlorite is found interstital to individual pillows and as matrix grains within the meta-basalt.
|
Na2Ca2Al6Si9O30 - 8H2O
- Fine fiber-like sprays with individual needles to 1"
| Na2Al2Si3O10 . 2H2O
- Radiating crystal groups line large pockets up to several feet long. Some natrolite pockets also contain a late stage clay mineral that coats the needles. Some pockets are completely filled with laminated clay.
| FeS2
- mm-sized disseminated grains are found within altered basalt adjacent to amygdules.
| |
Radiating NATROLITE |
Radiating NATROLITE |
Interpenetration twinned CALCITE |
White
APOPHYLLITE |
|
NATROLITE, CALCITE |
NATROLITE, ANALCIME |
