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Description
The Motic GM-168 Gemological Trinocular Microscope delivers certification-grade diamond clarity analysis and digital microphotography on an ergonomic tilting stand. Powered by a 0.75x to 5.0x Greenough zoom engine (1:6.7 zoom ratio), it provides continuous 7.5x to 50x magnification with an expansive 113 mm working distance. The heavy gemological base tilts smoothly from 0 degrees (flat horizontal) up to 45 degrees and rotates 360 degrees on its turntable, keeping gemologists upright and relaxed during marathon stone grading sessions.
Transmitted darkfield illumination relies on a 6V/30W quartz halogen bulb focused through an integrated darkfield iris diaphragm that adjusts from 41 mm down to 2 mm to choke out perimeter glare. An overhead 7W cool white fluorescent lamp on a position-retaining gooseneck arm provides diffuse daylight lighting to evaluate crown facet color. The 35-degree Siedentopf trinocular head features extra-widefield N-WF 10x/23 mm eyepieces and a vertical photo tube with a 50:50 optical split across a 9.0 kg frame shipped in a heavy-duty aluminum transit case.
Key Features of Motic GM-168 Gemological Trinocular Microscope
A professional trinocular gemological stereo zoom microscope featuring an iris-equipped darkfield halogen well, overhead fluorescent gooseneck, and a 0-to-45 degree tilting base. Combines 7.5x to 50x zoom with a 113 mm working distance, wire stone holder, and 23 mm eyepieces.
- Continuous 7.5x to 50x zoom magnification powered by a 0.75x to 5.0x Greenough engine
- Ergonomic gemological base tilts smoothly from 0 degrees up to 45 degrees with 360-degree rotation
- Integrated darkfield condenser well with adjustable iris diaphragm (41 mm down to 2 mm)
- High-output 6V/30W quartz halogen transmitted lamp renders true inclusion color metrics
- Overhead 7W fluorescent lamp on flexible metal gooseneck emits diffuse daylight spectrum
- Vertical photo port with fixed 50:50 optical split allows simultaneous camera capture
- Professional stainless steel wire stone holder grips gems securely over darkfield well
- Heavy-duty 9.0 kg chassis complete with locking aluminum industrial transit case
Transmitted Darkfield Halogen Well & Inclusion Grading
Standard brightfield illumination often washes out faint interior inclusions in diamonds and colored stones. The darkfield condenser directs high-intensity halogen light obliquely through the gem’s pavilion, illuminating internal fractures, mineral crystals, and liquid veils like bright stars against an ink-black background. The adjustable iris diaphragm lets you stop down the light well to block glare around stone perimeters, ensuring clean, definitive clarity grading.
0-to-45 Degree Tilting Stand & Trinocular Camera Capture
Spending hours evaluating stones on a flat stage leads to severe neck strain. The GM-168 solves that by letting you tilt the entire microscope frame back up to 45 degrees, bringing the oculars directly to eye level while you manipulate the 360-degree gem clamp. The vertical camera port lets you output live high-resolution video to archival computers or client displays, making professional appraisal documentation straightforward.
- Tilting base assembly promotes ergonomic posture during prolonged diamond appraisal shifts
- Diffuse 7W fluorescent gooseneck reveals true stone color traits without blinding hot spots
- Included aluminum transit case protects precision optics and mechanics during travel
Motic Five-Year Gemological Warranty Protection
Motic covers the GM-168 trinocular gemology workstation with a comprehensive five-year factory warranty covering optical elements, internal prism paths, and tilting base mechanics, backed by two years on electrical components. The complete package contains the GM-168 gemology base and trinocular zoom head, 7W gooseneck fluorescent lamp, internal halogen block, stainless steel wire stone holder, diffuse lens attachment, dust cover, and locking aluminum transit case.
Motic GM-168 Gemological Trinocular Stereo Zoom Microscope 7.5x-50x Working Distance 113mm Specs
| Brand | Motic |
| Full Model Code / SKU | GM-168 Trinocular Gemology Platform (Camera-Ready Advanced High-Resolution Station) |
| Country of Origin | Germany / China |
| Microscope Type | Advanced Trinocular Gemological Stereo Zoom Microscope with Phototube Assembly for High-Resolution Digital Microphotography of Inclusions |
| Optical System Type | Greenough Stereoscopic Optical Tracking System utilizing premium optical elements for maximized field flatness and color separation |
| Observation Tube Type | Trinocular Head Unit, Siedentopf type with top vertical imaging exit port mapping internal light beam splitter blocks (50:50 split ratio) |
| Tube Inclination & Rotation | 35° low ergonomic viewing posture tilt, 360° rotating head section, 52-76 mm interpupillary distance tracking adjustability |
| Eyepiece / Field of Number | N-WF 10x / 23 mm (Extra-wide field high-eyepoint ocular modules with independent diopter adjustment rings on both tubes) |
| Nosepiece Design | Continuous zoom optical turret layout driven by a large 1:6.7 ratio bilateral side-mounted control dial |
| Objectives Classification | Achromatic High-Resolution Zoom Objective Range with specialized multi-layer anti-glare coatings |
| Objectives Magnification Breakdown | Continuous zoom objective ratio tracking across a 0.75x to 5.0x scaling path |
| Total Magnification Range | Continuous zoom from 7.5x up to 50x parameters with standard 10x eyepieces |
| Focusing Type & Graduation | Heavy-duty coarse focusing system with integrated mechanical tension tuning adjusters; complete focusing stroke range exactly 125 mm |
| Stage Dimensions & Surface Coating | Specialized multi-functional gem stage block measuring 306 x 236 mm with dual-sided mounting threads for auxiliary holding tools |
| Stage Travel Range & Controls | Extended base assembly tracking a full 0° to 45° comfort incline tilt range alongside a complete 360° rotary base layout |
| Condenser Type & Numerical Aperture | Integrated adjustable darkfield iris diaphragm assembly controlling light fields across a Ø41 mm down to Ø2 mm opening profile |
| Illumination Transmitted Type | Base integrated 6V / 30W Quartz Halogen transmissive bulb for precise deep brightfield and darkfield inclusion mapping |
| Illumination Epi-EPI/Reflected | Top frame mounted 7W cool white fluorescent lamp module tracking over a highly flexible, position-retaining metal gooseneck arm |
| Light Intensity Management | Base integrated electronic variable analog rotary potentiometer layout for smooth brightness logging controls |
| Camera Port / C-Mount Adapter Split | Top vertical straight photo exit tube configured for separate c-mount adapter sleeves to mount external digital imaging sensors |
| Contrast Methods Capability | High-resolution darkfield inclusion tracking, simultaneous digital image data capture, transmitted brightfield screening, surface texture evaluation under oblique rays |
| Power Supply & Voltage Input | Internal universal switching auto-voltage power state system accepting 100-240V AC electrical currents |
| Physical Dimensions & Net Weight | Chassis depth 391 mm, profile width 236 mm, complete assembly height 520 mm, structure net weight exactly 9.0 kg |
| Standard Package Accessories Included | GM-168 gemology base and trinocular zoom head, vertical top photo port cover cap, 7W gooseneck fluo lamp, internal halogen block, professional stainless steel wire stone holder, diffuse lens attachment, vinyl dust cover, aluminum industrial transit lock case |
| Primary Application & Environment | Digital diamond certificate archiving stations, forensic gemology research laboratories, high-end commercial photo capture desks, professional gem appraiser workstations |
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