(2) Summary of Significant Accounting Policies

a. Basic of Presentation

In the opinion of the Company's management, the accompanying condensed consolidated financial statements include all adjustments necessary for a fair presentation in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) of the results for the interim periods presented and such adjustments are of a normal, recurring nature. The accompanying condensed consolidated financial statements should be read in conjunction with the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2012. There have been no material changes to the Company's significant accounting policies during the three months ended September 30, 2012.

b. Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect amounts reported in the condensed consolidated financial statements and related notes. Significant estimates and assumptions in these condensed consolidated financial statements include the valuation of inventories; the carrying amount of property, plant, and equipment; estimates of fair value associated with accounting for business combinations; goodwill and long-lived asset impairment tests; estimates of fair value of investments; income taxes and deferred tax valuation allowances; valuation of derivative instruments; the determination of the discount rate and the rate of return on plan assets for pension expense; and the determination of the fair value of share-based compensation involving assumptions about forfeiture rates, stock volatility, discount rates, and expected time to exercise. During interim periods, provision for income taxes is recognized using an estimated annual effective tax rate. Due to the inherent uncertainty involved in making estimates, actual results could differ from these estimates.

c. Revenue Recognition

Revenue is recognized in accordance with Financial Accounting Standards Board (FASB) ASC Topic 605, Revenue Recognition, when a firm sales agreement is in place, delivery has occurred and title and risks of ownership have passed to the customer, the sales price is fixed or determinable, and collectability is reasonably assured. Shipping and other transportation costs charged to buyers are recorded in both net sales and cost of goods sold. Sales taxes collected from customers and remitted to governmental authorities are accounted for on a net basis and, therefore, are excluded from net sales. When the Company provides a combination of products and services to customers, the arrangement is evaluated under ASC Subtopic 605-25, Revenue Recognition — Multiple ElementArrangements (ASC 605.25). ASC 605.25 addresses certain aspects of accounting by a vendor for arrangements under which the vendor will perform multiple revenue-generating activities. If the Company cannot objectively determine the fair value of any undelivered elements under an arrangement, the Company defers revenue until all elements are delivered and services have been performed, or until fair value can objectively be determined for any remaining undelivered elements.

d. Property, Plant, and Equipment

Property, plant, and equipment are recorded at cost. Depreciation is calculated using the straight-line method based on the estimated useful lives of assets. The estimated useful lives of property, plant, and equipment are as follows:

	Range of
	Useful Lives
Asset type:
Land improvements and land use rights		20 to 36 years
Buildings		35 to 40 years
Manufacturing equipment		5 to 25 years
Furnaces		10 to 20 years
Other		2 to 5 years

Costs that do not extend the life of an asset, materially add to its value, or adapt the asset to a new or different use are considered repair and maintenance costs and expensed as incurred.

Costs for mineral properties and mine development incurred to expand capacity of operating mines or to develop new mines are capitalized and charged to operations over the estimated tonnage of minerals to be removed. Mine development costs include costs incurred for site preparation and development of the mines during the development stage.

e. Recently Implemented Accounting Pronouncements

In June 2011, the Financial Accounting Standards Board (FASB) amended its accounting guidance on the presentation of comprehensive income in financial statements to improve the comparability, consistency and transparency of financial reporting and to increase the prominence of items that are recorded in other comprehensive income. The new accounting guidance requires entities to report components of comprehensive income in either (1) a continuous statement of comprehensive income or (2) two separate but consecutive statements. The provisions of the guidance were effective as of the beginning of our 2013 fiscal year. Accordingly, we have presented the components of net income and other comprehensive income for the three months ended September 30, 2012 and September 30, 2011 as two separate but consecutive statements. In June 2012, the FASB issued a new proposal that would require an entity to provide enhanced footnote disclosures to explain the effect of reclassification adjustments on other comprehensive income by component and provide a tabular disclosure in the footnotes showing the effect of items reclassified from accumulated other comprehensive income on the line items of net income. We will continue to monitor the FASB's activities related to the proposed guidance.

In September 2011, the FASB issued new accounting guidance that permits an entity to first assess qualitative factors of whether it is more likely than not that a reporting unit's fair value is less than its carrying amount before applying the two-step goodwill impairment test. An entity would continue to perform the historical first step of the impairment test if it fails the qualitative assessment, while no further analysis would be required if it passes. The provisions of the new guidance were effective for, and had no impact on, our 2012 annual goodwill impairment test results.