Nama Resource Estimate

Caledonia Mining Corporation
16 April 2007



The issuer advises that the following announcement replaces the announcement
issued under RNS number 9248U at 14.00 hours today. The words 'to NI 43-101'
have been deleted in the first line of the fifth paragraph and as stated in the
last paragraph the NI 43-101 compliant report will be available within 45 days

                          Caledonia Mining Corporation

    Caledonia Announces Additional Resource at Nama Cobalt Project in Zambia

Toronto, Ontario - April 16, 2007: Caledonia Mining Corporation ('Caledonia')
(TSX: CAL, NASDAQ-OTCBB: CALVF and AIM:CMCL) is pleased to announce that an
additional Indicated Resource has been identified at the Anomaly 'C' area on the
Nama Cobalt and Copper Project in Zambia.

Nama

Caledonia is the 100% owner of the Nama Project, which covers a number of
polymetallic oxide deposits containing cobalt and copper, located on the
northwestern flank of the Zambia Copperbelt.

Resources

This new estimate which is in addition to the resource reported in Caledonia's
Press Release of March 19, 2007, has identified a potentially economic resource
of cobalt with lesser quantities of copper and nickel in the Anomaly 'C' area.

The resource lies within four blocks within the target area to a depth of 150
meters, the full depth extent of which has not yet been determined. The
evaluation is based on 73 drill holes collared on 13 section lines. The maximum
hole spacing is 300 meters.

Indicated Resources at Anomaly 'C'

Resource blocks              Tonnes          % Co          % Cu          % Ni
in Anomaly C

Block C3                 41,637,000        0.0505        0.0173        0.0195
Block C2 North              526,000        0.0245        0.0134        0.0126
Block C2 South           32,511,000        0.0350        0.0053        0.0180
Block C1                  3,544,000        0.0261        0.0029        0.0131
Totals                   78,218,000         0.043         0.012         0.019

The estimate was prepared by Mr. David Grant BSc, MSc, Pr Sci Nat, CGEOL, FGS,
FGSSA, FSAIMM who is the Independent Qualified Person for the purposes of
Canadian securities regulations for the Nama project. Mr. Grant was following-up
on a recommendation made in his Technical Report for the Anomaly 'A' resource,
which can be viewed at http://www.caledoniamining.com/technical.php

        Indicated Resources at Anomaly 'A' (as reported March 19, 2007)

Resource blocks              Tonnes          % Co          % Cu          % Ni
in Anomaly A

Block A1                  9,139,000        0.0446        0.1028        0.0133
Block A2                 11,366,000        0.0613        0.0288        0.0067
Block A3                  4,305,000        0.0490        0.0730        0.0309
Block A4                 18,846,000        0.0572        0.1463        0.0086
Totals                   43,656,000         0.055         0.099         0.011



Combined Indicated Resources at Anomalies 'A' and 'C'

Anomaly                       Tonnes          % Co          % Cu          % Ni

Anomaly 'A'               43,656,000         0.055         0.099         0.011
Anomaly 'C'               78,218,000         0.043         0.012         0.019
Totals                   121,874,000         0.047         0.043         0.016

All estimates where prepared at a 0.02% cobalt cut-off

Additional Potential

As previously reported 16 cobalt anomalies in total have been identified in the
Nama Project area of which 5 have been explored to varying extents. As a
priority a drilling program to investigate the extensions to Anomaly 'A', in
addition to Anomalies 'C' and 'D' is currently being considered with a view to
defining an additional resource in the near future. The remaining 11 anomalies,
with similar potential to above anomalies, all require follow-up drilling and
geological field programs.

Technical Report

As required by Canadian regulations a Technical Report, compliant with National
Instrument (NI) 43-101 specifications, is being prepared by Mr. Grant to define
the Resources of both Anomaly 'A' and Anomaly 'C' at the Nama Cobalt Project.
This report will be filed on SEDAR and on the Caledonia website within
forty-five days of this press release.

For more information, please contact:

Stefan Hayden                                     Alex Buck / Nick Bias
President and CEO, Caledonia Mining               buck-bias
Tel: [phone]                              Tel: [phone]

Jeremy Porter
Seymour Pierce
Tel: [phone]

Further information regarding Caledonia's exploration activities and operations
along with its latest financials may be found at www.caledoniamining.com.

Certain statements included herein are 'forward-looking statements'.  Management
cautions that forward-looking statements are not guarantees and that actual
result could differ materially from those expressed or implied in the
forward-looking statements.  Important factors that could cause the actual
results of operations, exploration or development programs, or the financial
condition of the Company, to differ include, but are not necessarily limited to,
the risks and uncertainties discussed in documents filed by the Company with the
various regulatory authorities having jurisdiction.




                      This information is provided by RNS
            The company news service from the London Stock Exchange