    <SEC-DOCUMENT>0001193125-19-253049-index.html : 20190924
    <SEC-HEADER>0001193125-19-253049.hdr.sgml : 20190924
    <ACCEPTANCE-DATETIME>20190924092900
    ACCESSION NUMBER:		0001193125-19-253049
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		10
    CONFORMED PERIOD OF REPORT:	20190924
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20190924
    DATE AS OF CHANGE:		20190924

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			II-VI INC
    		CENTRAL INDEX KEY:			0000820318
    		STANDARD INDUSTRIAL CLASSIFICATION:	OPTICAL INSTRUMENTS & LENSES [3827]
    		IRS NUMBER:				251214948
    		STATE OF INCORPORATION:			PA
    		FISCAL YEAR END:			0630

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-16195
    		FILM NUMBER:		191109413

    	BUSINESS ADDRESS:
    		STREET 1:		375 SAXONBURG BLVD
    		CITY:			SAXONBURG
    		STATE:			PA
    		ZIP:			16056
    		BUSINESS PHONE:		724-352-4455

    	MAIL ADDRESS:
    		STREET 1:		375 SAXONBURG BLVD
    		CITY:			SAXONBURG
    		STATE:			PA
    		ZIP:			16056
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>d808405d8k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: d808405d8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>d808405dex991.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: d808405dex991.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g808405ex99_1s1g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g808405ex99_1s1g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g808405ex99_1s2g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g808405ex99_1s2g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g808405ex99_1s3g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g808405ex99_1s3g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g808405ex99_1s4g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g808405ex99_1s4g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g808405ex99_1s5g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g808405ex99_1s5g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g808405ex99_1s6g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g808405ex99_1s6g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g808405ex99_1s7g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g808405ex99_1s7g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g808405ex99_1s8g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g808405ex99_1s8g1.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>