BRC DiamondCore updates exploration at Silverstreams Project

    TSX: BCD
    JSE: BCD

    TORONTO, and JOHANNESBURG, South Africa, June 11 /CNW/ - BRC DiamondCore
Ltd. (the "Company") (TSX - BCD; JSE - BCD) is pleased to provide the
following update on bulk sampling and exploration drilling being conducted by
the Company on the Company's Silverstreams Project in the Northern Cape
Province of South Africa. The Silverstreams Project, which is the most
advanced of the Company's alluvial diamond projects, covers 3,589 hectares and
is located on the northern bank of the Orange River some 14 kilometres from
the town of Prieska.

    -   A total of 1,465.25 carats ("ct") have been recovered from bulk
        samples at an average recovered grade of 0.27ct per hundred tonnes.
    -   713 vertical percussion boreholes (total length of 6,019 metres) have
        been drilled over the property.

    Bulk Sample Results
    The table below summarizes the results from all bulk samples taken to date
at Silverstreams:

                                          AVE.          RECOV- BOTTOM   TOP
                           VOLUME STONES STONE           ERED  SCREEN SCREEN
                          TREATED  RECOV- SIZE          GRADE    SIZE   SIZE
    SAMPLE      LOCALITY  (tonnes)  ERED  (ct)  CARATS (cpht)(1) (mm)   (mm)
    NN1 Midlings     NN1   12,616      7  0.80     5.62   0.04    1.2     50
       NN1 TOTAL/AVERAGE   12,616      7  0.80     5.62   0.04
    PDJ1 Bottoms    PDJ1   17,629     21  1.02    21.42   0.12
      PDJ1 TOTAL/AVERAGE   17,629     21  1.02    21.42   0.12
       SS1           SS1    4,852     39  0.94    36.62   0.75
       SS1 TOTAL/AVERAGE    4,852     39  0.94    36.62   0.75
       SS2           SS2   48,341    123  1.43   175.82   0.36
       SS2 TOTAL/AVERAGE   48,341    123  1.43   175.82   0.36
    SS3 Midlings           25,742     11  0.82     9.07   0.04
    -------------    SS3   --------------------------------------------------
    SS3 Bottom             40,003      9  3.92    35.24   0.09
       SS3 TOTAL/AVERAGE   65,745     20  2.22    44.31   0.07
    SS4 Midlings           18,557     12  1.00    11.98   0.06
    -------------    SS4   --------------------------------------------------
    SS4 Bottom             26,547     28  0.82    22.95   0.09
       SS4 TOTAL/AVERAGE   45,104     40  0.87    34.93   0.08
    SS5 Midlings           30,036     34  1.96    66.51   0.22
    -------------    SS5   --------------------------------------------------
    SS5 Bottom              9,073     24  1.88    45.02   0.50
       SS5 TOTAL/AVERAGE   39,109     58  1.92   111.53   0.29
    SS6 Bottom       SS6   12,600     27  1.93    52.04   0.41
       SS6 TOTAL/AVERAGE   12,600     27  1.93    52.04   0.41
    SS7 Midlings           26,342     29  1.79    51.81   0.20
    -------------    SS7   --------------------------------------------------
    SS7 Bottom             54,198    103  1.60   165.24   0.30
       SS7 TOTAL/AVERAGE   80,540    132  1.64   217.05   0.27
    SS8 Bottoms      SS8   21,208     30     1       41   0.19
       SS8 TOTAL/AVERAGE   21,208     30  1.35    40.57   0.19
    SS9 Bottom       SS9   37,268     47     2       80   0.21
       SS9 TOTAL/AVERAGE   37,268     47  1.70    79.87   0.21
    SS10 Bottoms    SS10   21,887     17     1       19   0.09
      SS10 TOTAL/AVERAGE   21,887     17  1.14    19.42   0.09
    SS11 Bottoms    SS11   10,530     20     2       49   0.47
      SS11 TOTAL/AVERAGE   10,530     20  2.46    49.00   0.47
    SS12 Bottoms    SS12   16,913     21     2       34   0.20
      SS12 TOTAL/AVERAGE   16,913     21  1.64    34.44   0.20
    SS13 Bottoms    SS13   19,220     21     2       37   0.19
      SS13 TOTAL/AVERAGE   19,220     21  1.75    36.71   0.19
    SS14 Bottoms    SS14   21,318     22     2       35   0.16
      SS14 TOTAL/AVERAGE   21,318     22  1.59    35.07   0.16
    SS15 Bottoms    SS15    5,491      3     1        2   0.03
      SS15 TOTAL/AVERAGE    5,491      3  0.52     1.56   0.03
    SS16 Bottoms    SS16   17,330     18     2       34   0.20
      SS16 TOTAL/AVERAGE   17,330     18  1.89    34.06   0.20
    SS17 Bottoms    SS17   19,878     45     2      109   0.55
      SS17 TOTAL/AVERAGE   19,878     45  2.43   109.42   0.55
    SS18 Bottoms    SS18   33,620    108     3      326   0.97
      SS18 TOTAL/AVERAGE   33,620    108  3.02   325.79   0.97
     GRAND TOTAL/AVERAGE  551,199    819  1.71 1,465.25   0.27
    (1) "cpht" refers to carat per hundred tonnes.

    The bulk samples taken to date indicate a range of recovered (fully
diluted, delivered to Pan Plant) sampling grades between 0.03cpht to 0.97cpht
(with a weighted average of 0.27cpht). In general, the Basal Gravels exhibit
higher recovered grades (averaging ~0.3cpht) than the Suspended Gravels
(averaging ~0.13cpht). These recovered sampling grades, while lower, are in
range of the average 0.5cpht grade estimated for the Inferred Mineral Resource
at Silverstreams reported by independent consultants, Venmyn Rand (Pty)
Limited, in the technical report dated July 31, 2007 and entitled "National
Instrument 43-101 Technical Report Prepared on the Mineral Assets of Diamond
Core Resources Limited in the Northern Cape and Free State Provinces, South
Africa" (the "NI 43-101 Technical Report"). It should be noted, however, that
the grade reported in the NI 43-101 Technical Report was based on records of
recovered grades from similar gravels on neighboring properties and was
classified as Inferred due to the low level of confidence in this estimate.
The bulk sampling grades set out in the table above therefore represent the
first recovered grades from Silverstreams and additional bulk sampling,
accompanied by a re-assessment of the volume of gravels on the property, will
be required in order to provide a better estimate of the grade of the entire
    These results do, however, confirm the diamondiferous nature of the
gravels, as well as the localization of some very high grade areas (~1.0cpht).
    Among the 1,465.25cts recovered to date, the bulk samples have produced a
number of exceptional stones, including a 77.34ct diamond which was sold for
US$904,724 and a 13.65ct diamond which was sold for US$518,180 (see the
Company's press release dated June 3, 2008, a copy of which can be obtained
from SEDAR at

    Diamond Values from Samples
    An initial independent valuation of the diamonds recovered to date at
Silverstreams by independent diamond consultant, Mr. R. Ferraris, indicated a
conceptual weighted average diamond value of US$2,089/ct (this assessment only
related to diamonds recovered to date from bulk samples at Silverstreams and
not to the entire Silverstreams property).
    With respect to the diamond values realized through the three tender
sales carried out to date by the Company, the average value for the diamonds
recovered at Silverstreams has been significantly increased by a 77.34ct
diamond which sold for US$11,698/ct and a 13.65ct diamond which sold for
US$37,962/ct. These have resulted in a realized weighted average diamond value
for all diamonds recovered to date at Silverstreams of US$2,511.19/ct (see the
Company's press release dated June 3, 2008 for additional information
regarding the Company's most recent tender of diamonds).

    The Silverstreams Project has seen numerous phases of percussion drilling
and gravel orebody modelling, each representing a refinement of the previous
    Vertical percussion drilling over the property is ongoing in order to
refine the geological model of the gravels over the property. Initial drilling
was conducted on a 100 metre x 250 metre grid. Current in-fill drilling is
being done at a 100 metre x 50 metre grid in general, and in some areas this
grid is being in-filled at 25 metre x 25 metre drill spacing in order to
develop a detailed understanding of the gravel horizon development on
Silverstreams. The table below summarises the amount of percussion drilling
conducted on the property to date:

    713             6,019m            8km(2)

    All holes are logged by a qualified geologist according to, among other
things, gravel type, gravel quality, depth to bedrock, basal gravel thickness,
total gravel thickness and overburden thickness. A detailed description of the
sampling method and approach, sample preparation, analysis and security has
been detailed in the NI 43-101 Technical Report.

    Bulk Sampling/Trial Mining
    The Company began bulk sampling of the Silverstreams primary gravels in
July 2007 in order to better understand the gravel morphology, grade, degree
of calcretisation, stone value and sample metallurgical mass balance. This
bulk sampling is ongoing with the locality of the bulk samples being guided by
the results from the vertical percussion drilling. A detailed description of
the sampling method and approach, sample preparation, analysis and security
has been detailed in the NI 43-101 Technical Report.

    Sample Description
    Diamondiferous gravels at Silverstreams occur between 20 metres and 60
metres above the present day Orange River. These gravels are deposited on a
planar surface comprising shale and tillite of the Dwyka Group, which consists
almost entirely of tillite, with a variable clast assemblage of meta-basalt,
quartzite and dolomite with minor vein quartz, jasper, iron stone and agate.
The tillite bedrock is relatively soft and homogenous and is not amenable to
pot-hole formation, and hence fairly even.
    The alluvial diamonds are found in the following gravel deposits at

    -   the Rooikoppie Gravels; and
    -   the Primary Gravels which include:
        -  the Suspended Gravels (Midlings); and
        -  the Basal Gravels (Bottom).

    The Rooikoppie varies in thickness from a few centimetres up to 2 metres
and has an average thickness of 0.25 metres. The deposit consists of poorly
rounded pebbles of BIF, chert, jasper, quartzite and lava, and typically rests
on sand, gravel or in places a hard, semi-continuous layer of calcrete and
    The Primary Gravels are entirely covered by calcrete, aeolian sand and in
places Rooikoppie Gravel, and overlie relatively soft tillite bedrock. These
gravels are composed mainly of rounded clasts of Ventersdorp lava as well as
BIF, agate, jasper, vein quartz and quartzite. The gravel is partially
cemented in places, with impersistent sand lenses present. The Primary Gravels
have been deposited on a planed, slightly undulating bedrock which slopes
gently southwards towards the Orange River. These Primary Gravels form the
focus of the Company's current bulk sampling/trial mining activities.
    The overburden, which occurs between the Rooikoppie and Primary Gravels,
consists of a hard layer of calcrete and silcrete capping, which averages
between 0.5 metre and 1.0 metre in thickness. This calcrete capping grades
into a soft calcrete and sand sequence between 1 metre and 3 metres thick.
    To date, no Rooikoppie Gravels have been bulk sampled and are currently
treated as overburden where present. In general, the Suspended Gravels have
been processed separately from the Basal Gravels but some bulk samples have
combined these units. Since the current bulk sampling/trial mining positions
are being determined from the drilling results, the recovered grades tend to
be more representative of the Primary Gravels in the most prospective areas at

    Sample Treatment
    All bulk samples have been batch treated at the Company's Silverstreams
bulk sampling plant. While this plant has not been accredited in terms of
ISO/IEC 17025, the plant is subject to internal protocols and QA/QC procedures
which have been audited and approved by independent consultants, Venmyn Rand
(Pty) Limited ("Venmyn"), in terms of the plant's adherence to industry
standards. These include:

    -   surveying of the sample area before sampling by a qualified,
        independent surveyor;
    -   surveying of the sample area after sampling by a qualified,
        independent surveyor;
    -   delivering the sample directly into the plant, or stockpiling the
        sample material in a sterile, demarcated location;
    -   purging the plant between each sample by processing ~20t of barren
        material; and
    -   conducting weekly tracer tests on the pans, DMS and X-Ray to ensure
        plant efficiency.

    The gravel undergoes primary concentration at the Silverstreams bulk
sampling plant, which comprises:

    -   a primary 670tph trommel screen;
    -   magnetic seperators to remove banded ironstone;
    -   four 16ft rotary pan plants;
    -   a 50tph Bateman DMS unit;
    -   four Flowsort(R) X-Ray machines;
    -   three Bateman GB1000 automatic grease belts; and
    -   'hands-off' recovery of diamonds in a glove box.

    The +2mm -32mm material is treated through the rotary pan plant and DMS
section. The +32mm -50mm material is delivered separately to an attritioner
followed by the grease belts.
    No tailings audits have been conducted.
    Strict security controls are in place and the storage and movement of the
diamonds are recorded within a diamond register which documents the "chain of
custody" and is used to reconcile both the number of diamonds and carats of
each parcel produced.

    Qualified Person
    Neil Mc Kenna, an employee of Venmyn, is the "qualified person" (as such
term is defined in National Instrument 43-101) who prepared and is responsible
for the technical information in this press release. Mr. Mc Kenna (Pr.Sci.
Nat.) recently conducted a site inspection, and has verified the data
disclosed in this press release. The verification of the sampling data has
been done retrospectively and has been limited to a review and audit of the
sampling data, databases and sampling records provided to Mr. Mc Kenna by the
Company. The Company's geologist on site was responsible for supervising the
sampling operations.
    Additional information with respect to the Company's Silverstreams
Project is contained in the NI 43-101 Technical Report. A copy of this report
can be obtained from SEDAR at

    BRC DiamondCore Ltd. is an African-focused diamond explorer active in
South Africa and the Democratic Republic of the Congo (the "DRC"). Led by a
management team with extensive experience in diamond exploration and mine
development, the Company has a broad spectrum of projects ranging from
advanced stage trial mining operations through grass-roots exploration. The
Company's projects comprise both prospective alluvial gravels and primary
kimberlite targets. The Company works in a systematic and responsible manner
to discover, assess and develop diamond resources for the benefit of its
shareholders and local stakeholders.

    Forward-Looking Statements: This press release contains forward-looking
statements. All statements, other than statements of historical fact, that
address activities, events or developments that the Company believes, expects
or anticipates will or may occur in the future (including, without limitation,
statements relating to diamond prices, future diamond sales, future
production, exploration results, potential mineralization and the Company's
plans with respect to the exploration and development of its properties) are
forward-looking statements. These forward-looking statements reflect the
current expectations or beliefs of the Company based on information currently
available to the Company. Forward-looking statements are subject to a number
of risks and uncertainties that may cause the actual results of the Company to
differ materially from those discussed in the forward-looking statements, and
even if such actual results are realized or substantially realized, there can
be no assurance that they will have the expected consequences to, or effects
on the Company. Factors that could cause actual results or events to differ
materially from current expectations include, among other things, the
possibility that future exploration results will not be consistent with the
Company's expectations, changes in equity markets, changes in diamond markets,
foreign currency fluctuations, political developments in South Africa or the
DRC, changes to regulations affecting the Company's activities, uncertainties
relating to the availability and costs of financing needed in the future,
delays in obtaining or failure to obtain required project approvals, the
uncertainties involved in interpreting geological data and the other risks
involved in the diamond exploration business. Any forward-looking statement
speaks only as of the date on which it is made and, except as may be required
by applicable securities laws, the Company disclaims any intent or obligation
to update any forward-looking statement, whether as a result of new
information, future events or results or otherwise. Although the Company
believes that the assumptions inherent in the forward-looking statements are
reasonable, forward-looking statements are not guarantees of future
performance and accordingly undue reliance should not be put on such
statements due to the inherent uncertainty therein.

For further information:

For further information: please visit our website,, or contact: In Toronto: Martin D. Jones, Vice
President, Corporate Development, at (416) 366-2221 or 1-800-714-7938; In
Johannesburg: James Duncan, Russell & Associates, at 27-11-880-3924

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