Precious stone testing apparatus

The ornamental design for a precious stone testing apparatus, as shown and described.

FIG. 1 is a perspective view of precious stone testing apparatus showing my new design.

FIG. 2 is a left view thereof.

FIG. 3 is a right view thereof.

FIG. 4 is a front end view thereof.

FIG. 5 is a rear view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Patent	Priority	Assignee	Title
D872601,	Jun 22 2017	PROCEQ AG	Concrete measuring instrument
D882423,	Jun 22 2017	PROCEQ AG	Ground penetrating radar detection device
ER130,
ER5675,
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ER7594,
ER8535,
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Patent	Priority	Assignee	Title
6043742,	Apr 29 1998		Apparatus and process for detecting man-made gemstones
8564316,	Jun 21 2010	SY KESSLER SALES, INC	Gem tester
8947111,	Jul 09 2010	Shenzhen DiKai Industrial Co., Ltd.	Multi-functional precious stone testing apparatus and method thereof

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