Colemanite
Spec Sheet

________________________________________________________________________

CHEMICAL ANALYSIS:

                                                                              Contract Specifications

Component                                           Maximum              Minimum            Typical

B203                                                           *42.25                   * 40.25               *41.25

Na20                                                               0.5                                                   *   .12

Ca0                                                               28.0                          25.0                *27.25

Fe203                                                             0.3                                                        .03

Si02                                                                7.0                                                  *  3.99

A1203                                                             1.0                                                 *    .08

Sr0                                                                  1.5                                                  *  1.28

Mg0                                                                3.0                                                  *  1.53

S03                                                                  0.8                                                  *   .33

LOI-1600 degrees F for 30 minutes         26.5                                                *24.14

H20-110   degrees C for 4 hours                  2.0                                                    1.00

PHYSICAL ANALYSIS:   Cumulative Weight/Percent Retained

U.S. Screen                                             Maximum                         

Size Mesh                                            (Not to Exceed )                                Typical

+          60                                                        .05                                                  .02

+          70                                                        .25                                                  .07

+        100                                                      3.25                                                  .43

+        140                                                      9.25                                                2.47

+        200                                                    20.00                                                9.03

+        pan                                                 100.00                                           100.00

OTHER PHYSICAL DATA:

Specific Gravity                                           2.4                     Hardness (Mohs Scale)

Angle of Repose-settled                              25 degrees

Reactivity with Steel                                    none                  Colemanite   4.5

Bulk Density (pounds/cubic Feet)                                        Calcite           3.0

         Tap                                                      90

         Pour                                                     70

M/V “OKOLTCHITZA"                                                     Issued           06/30/06

            5/06                                                                             (Supersedes  2/27/06)        

*Denotes Changes