Silverstone Resources Corp.
TSX VENTURE : SST

Silverstone Resources Corp.

December 13, 2007 07:00 ET

Silverstone Completes Definition Drilling on the Animas-Refugio Vein, Copala Project, Sinaloa State, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Dec. 13, 2007) - Silverstone Resources Corp. ("Silverstone") (TSX VENTURE:SST) is pleased to report results from 44 additional drill holes (6,288m HQ core drilling) from the company's Phase IIA drilling on the Copala silver-gold project. Copala is located 60km ENE of Mazatlan, Sinaloa State, Mexico. The assay results are for infill and exploration drilling on the Animas-Refugio vein in the Clemens-El Muerto sector. Drilling has been completed in this sector of the vein and the company will release an independent resource estimate in the 1st quarter of 2008.

Highlights

- SC-07-98 - 5.59 meters grading 1.57 g/t gold and 223 g/t silver

- SC-07-99 - 7.91 meters grading 1.10 g/t gold and 138 g/t silver

- SC-07-103 - 15.53 meters grading 0.44 g/t gold and 62 g/t silver

- SC-07-105 - 7.52 meters grading 0.87 g/t gold and 153 g/t silver

- SC-07-110A - 13.9 meters grading 0.63 g/t gold and 145 g/t silver

- SC-07-125 - 4.0 meters grading 1.67 g/t gold and 214 g/t silver

The following table presents a summary of the results for drill holes SC-07-80 and SC-07-87 to SC-07-131:



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True Ag
Thick- Equiv-
Inter- ness alent
From To val (m) Au Ag (g/t)
Hole No. (m) (m) (m) (i) (g/t) (g/t) (ii)
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SC-07-80 60.25 64.25 4.00 3.58 0.35 43 63
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SC-07-89 70.25 72.25 2.00 1.00 0.66 75 111
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SC-07-98 104.75 110.75 6.00 5.59 1.57 223 309
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including 105.75 108.50 2.75 2.56 3.00 402 567
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SC-07-99 115.00 123.50 8.50 7.91 1.10 138 199
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including 118.25 122.00 3.75 3.49 1.89 240 344
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SC-07-100A 138.50 152.00 13.50 11.26 0.44 69 93
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including 139.50 141.50 2.00 1.67 1.96 195 302
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SC-07-101 109.00 113.25 4.25 2.57 0.26 52 66
-----------------------------------------------------------------------
SC-07-102 140.00 152.75 12.75 9.61 0.43 71 95
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including 148.00 150.50 2.50 1.89 0.88 145 193
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SC-07-103 9.50 26.00 16.50 15.53 0.44 62 86
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including 19.00 25.00 6.00 5.65 0.65 100 136
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SC-07-104 13.00 32.00 19.00 15.83 0.09 25 30
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SC-07-105 156.50 166.50 10.00 7.52 0.87 153 201
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including 156.50 160.25 3.75 2.82 1.51 249 332
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SC-07-106 24.50 47.00 22.5 20.70 0.20 32 43
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SC-07-107A 109.00 111.75 2.75 2.32 0.06 33 36
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SC-07-108 47.00 52.00 5.00 3.54 0.52 92 121
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including 48.00 49.75 1.75 1.24 1.08 181 240
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SC-07-110A 3.00 18.50 15.5 13.9 0.63 145 180
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including 10.50 15.50 5.00 4.47 1.48 358 440
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SC-07-113 77.50 83.75 6.25 5.01 0.74 85 126
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including 80.75 82.00 1.25 1.00 1.53 175 260
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SC-07-114 137.00 141.50 4.50 3.09 0.36 61 81
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SC-07-116 27.00 30.50 3.50 2.47 0.69 128 166
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SC-07-120 138.00 141.0 3.00 2.45 0.45 70 95
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SC-07-124 32.00 34.75 2.75 2.63 0.94 148 199
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SC-07-125 60.50 65.00 4.50 4.00 1.67 214 306
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including 64.25 64.50 0.25 0.22 9.24 2810 3318
-----------------------------------------------------------------------
SC-07-126 77.75 82.75 5.00 3.91 0.77 136 178
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including 80.00 81.50 1.50 1.17 1.11 252 313
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SC-07-129 91.75 94.00 2.25 1.63 2.68 412 560
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SC-07-131 86.00 87.75 1.75 1.42 0.15 21 30
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- (i) True widths are estimated by correcting for the strike and dip of
the vein and the bearing and inclination of the drill hole.
- (ii) Ag Equivalent is the sum of the Au multiplied by 55 plus the Ag
grade.
- Holes SC-07-87, 88, 90, 91, 92, 93, 94, 95, 96, 97, 111, 115, 117,
118, 119, 121, 122, 123, 127, 128 & 130 contain only anomalous values.
- Results for holes SC-07-109 and SC-07-112 are pending.
- Drill hole location maps are found on Silverstone's website at
www.silverstonecorp.com.


The drill program included both infill and step out drill holes to define the extent of mineralization both down dip and along strike. Many of the holes peripheral to known mineralization contained only anomalous gold and silver values as expected. Previous press releases included results up to and including SC-07-86 with the exception of SC-07-80.

The mineralization in the Clemens-El Muerto sector varies considerably in width. Wider, lower grade zones near surface may be amenable to open pit mine development. Narrower and higher grade zones have potential for underground mining. Preliminary metallurgical test work by PRA of Vancouver indicated recoveries above 80% for both gold and silver for both standard flotation and cyanide leach processes. This work was undertaken on a single sample composite taken from the historic workings at both the Clemens and El Muerto mines. These flotation results were confirmed by a custom mill located within 7 km of the Animas-Refugio vein.

Phase III drilling at Copala is focused on the La Colorada vein. This area of current drilling is located about 5.5 km WSW from the Clemens-El Muerto sector. Initial results from the Phase III drilling are expected in January.

Samples were assayed by ALS Chemex in Vancouver. Blank, standard and duplicate pulp samples have also been assayed by ALS Chemex and duplicate core samples have been sent to SGS Lakefield in Toronto, Ontario. The results for these QA/QC samples have been acceptable in the mineralized intervals and additional QA/QC analyses are in progress.

Hugh Willson, Vice President of Exploration for Silverstone and a qualified person under NI 43-101, has reviewed the contents of this news release and supervised the Copala Project for Silverstone since its inception.

The company has granted 100,000 incentive stock options at a price of $2.50 for a period of five years to employees of the company.

ABOUT SILVERSTONE

Silverstone is a growth oriented silver mining company with 100% of its revenue from silver production. Silverstone expects to have 2007 silver sales of approximately 0.7 million ounces and increasing to 3 million ounces in 2009. More information is available online at: www.silverstonecorp.com.

This news release does not constitute an offer to sell or a solicitation of an offer to sell any of the securities in the United States. The securities have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act") or any state securities laws and may not be offered or sold within the United States or to U.S. Persons unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such registration is available.

The TSX Venture Exchange has neither approved or disapproved of the contents herein.

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