Basalt clays .Use at your own risk. I have not tested them.
Claybody Name: Basalt 2
Cone: 9
Color: black
Typical Usage:
Firing: oxidation
Testing: Untested
Base Glaze:	Pct Amount	Batch
Ball clay	52.00	52.0
Silica	12.00	12.0
Neph Sy	2.00	2.0
bentonite	4.00	4.0
Red iron oxide	21.00	21.0
Manganese Dioxide	9.00	9.0
TOTALS:	100	100
Claybody Name: Basalt 3
Cone: 6
Color: black
Typical Usage:
Firing: oxidation
Testing: Untested
Base Glaze:	Pct Amount	Batch
Ball clay	44.00	44.0
silica	1.00	1.0
potash feldspar	2.00	2.0
Manganese Dioxide	9.00	9.0
Yellow Ochre	44.00	44.0
TOTALS:	100	100
Claybody Name: Basalt 4
Cone: 6
Color: black
Typical Usage:
Firing: oxidation
Testing: Untested
Base Glaze:	Pct Amount	Batch
Ball clay	18.00	18.0
silica	5.00	5.0
kaolin	50.00	50.0
Manganese Dioxide	10.00	10.0
red iron oxide	15.00	15.0
bentonite	2.00	2.0
TOTALS:	100	100
Claybody Name: Basalt 5
Cone: 6
Color: black
Typical Usage:
Firing: oxidation
Testing: Untested
Base Glaze:	Pct Amount	Batch
Ball clay	15.00	15.0
Redart Clay	40.00	40.0
kaolin	18.00	18.0
Manganese Dioxide	6.00	6.0
red iron oxide	16.00	16.0
bentonite	3.00	3.0
Neph Sy	2.00	2.0
TOTALS:	100	100
Claybody Name: Black Throwing Body
Cone: 6
Color: black
Typical Usage: Throwing
Firing: Reduction
Testing: Untested
Base Glaze:	Pct Amount	Batch
Ocmulgee Clay	48.54	242.7
Pine Lake Fireclay	14.56	72.8
Goldart	14.56	72.8
Ball Clay	9.71	48.5
Barnard Clay	9.71	48.5
Iron oxide	2.91	14.6
TOTALS:	100	500.0