Motic Gem Microscope GM171-Trinocular

Motic Gem Microscope GM171-Trinocular

Motic Gem Mircroscope GM171-Binocular

The GM-171 series Gemology Microscope is highly effective in the observation of minerals and crystals, the appraisal of precious stones. It can also be employed in chemical and biological research. The microscope’s magnification system produces high definition, high resolution, and life-like colour stereo images.

The GM-171 combines the classic Motic SMZ171 7.5X-50X stereo microscope head with a modern brightfield/darkfield gem stand in an efficient, affordable tool for the gemological and precious minerals industry. Rugged and precise, the GM171 optics offer higher magnification than the GM161, helping users perform identification and analysis quickly and efficiently. A generous 110mm working distance allows easy access and manipulation of the gem. Available in binocular or trinocular version for digital documentation, they feature a swivel base which rotates 360 degrees and tilts 45 degrees to assist client viewing. The microscope comes with a foam-padded aluminum carrying and storage case. Lifetime Limited Warranty.

Availability: In stock

Microscope Head

  • The SMZ171 stereo head is an excellent choice for jewelry and gem stone inspection at an affordable price. The parfocal zoom ratio is 6.7:1, offering a magnification range of 7x-50x with dual-sided zoom controls and a working distance of 110mm. The head is inclined 45° and includes lnear sliding interpupillary adjustment of 50mm-75mm.
  • High Eyepoint widefield 10X/F.N.23 eyepieces come standard, offering dual dioptric adjustment and a broad field of view ranging from 30.67mm to 1.33mm. Optional eyepiece powers include 15X and 20X, for additional magnification of 75X and 100X respectively, without the loss of working distance. Finally, the microscope is available in binocular or trinocular format to easily capture digital images for documentation, promotion or client use. Please note that a trinocular adapter is required to fit your camera.

Illumination & Stage

  • Brightfield / Darkfield illumination is from powerful and consistent 6V30W variable-intensity Halogen with an aperture diaphragm adjustable from 41mm to 2mm. This allows depth of field and contrast control for easier stone identification. Incident illumination is provided by a 7-watt, 6000-degree color temp fluorescent light box on a flexible goose neck arm. The stage offers two mounting points for a gem holder and inclusion pointer along with adaptation for optional contrasting methods like immersion or polarization.


  • The professional gem stand features dual focus controls for precise movement through 125mm of vertical range, to accommodate different gems and stones. An integral swivel base allows 360-degree rotation and the arm inclines 45 degrees for flexible viewing positions by jeweler or client.
Write Your Own Review
You're reviewing:Motic Gem Mircroscope GM171-Binocular
Your Rating

Specifications : Motic Gem Mircroscope GM171-Binocular

Type: Greenough Zoom Optical System - Relax View accessible
Head: Viewing head tilts 0-45° range, with dual diopter adjustments, interpupillary adjustment from 48mm to 75mm. 
Mag. Range: 7.5X - 50X, WD = 110mm
Eyepieces: High eye point widefield 10X/F.N. 23
Stand: Specialized Gemology Tilting Base - 0° to 45° Tilting range; 360° rotary base

6V/30W Intensity controlled Halogen Bright field/ Dark field illumination

Adjustable gooseneck 7W fluorescent incident illumination

Main Supply 110V


1.5X Objective, WD =  56.3mm

2.0X Objective, WD = 38.6mm

Accessories: Wire Gem Holder - Aluminum Carrying Case
Warranty: Lifetime Limited Warranty
Dimension and weight
Length Width Height weight (Kgs)
Warranty: Lifetime Limited Warranty

Cautions :

  • Use:
    This microscope is to be used for observation purposes only.


  • Do not disassemble:
    Disassembly may lead to possible damage of the instrument and voidance of warranty. If a problem is discovered, please contact the Motic dealer nearest you.


  • Avoid getting burnt:
    Wait for the bulb and surrounding parts to cool down before changing. Keep flammable objects (gasoline, alcohol, cloth, paper, etc.) away from the bulb to avoid the possibility of a fire.


  • Check input voltage:
    The label on the back of the microscope clearly specifies the microscope’s input voltage which must be compatible with the local power supply. Using the microscope with a non-specified voltage rating can lead to damage of the instrument.


  • When changing the bulb please note:
    Only specified halogen bulbs and fluorescence tubes may be used. Before changing the bulb, turn off the power and unplug the power cable to avoid being electrocuted. When changing the bulb, do not let the bulb get dirty. The outer surface of the bulb must not be contaminated with dust or fingerprints etc.


  • Storage:
    Before moving the microscope, be sure the power is switched off.
    Microscope working temperature and humidity requirements:
    • Room temperature: 5°C ~ 35°C;
    • Maximum relative humidity: 65%


  • Operation:
    This microscope is a high precision instrument and must be handled and operated with extreme care. Jolting or aggressive operation can lead to damage of the instrument


We found other products you might like!