Technical Information and Manual: TRINO-Cut Gemstone

# # Technical information and manual: TRINO-shaped gem cut

Schemes for Faceting Machines The TRINO format is a design that emphasizes symmetry and complex reflectivity. The following information is in-depth detail for the uncut to use as an operational manual.

# # # Basic information of design (General Specifications)

* * * Uncut Name: * * TRINO

* * * Designer: * * Markku Lehto (2020)

* * * Shape: * * Modified Triangle Shape

* * * Symmetry: * * 3-way symmetry can be reversed as a mirror image (3-fold, mirror-image symmetry)

* * * Refractive Index: * * Design gauges and degrees for minerals with a value of $R.I. = 1.580 $, which best suits and draws sparkle when applied to Beryl minerals such as Aquamarine, Morganite or Goshenite.

* * * Facets: * * * There are 52 squares divided into 46 main cut squares and 6 edges (Girdles).

* * * Index Gear Plate: * * Required to use 96 standard degree plates

# # # Technical Proportions (Proportions)

These variables are of paramount importance to the uncut in assessing the size, proportion and weight loss of raw mineral nodules (Rough) before taking action:

* * * L / W (Length / Width): * * $1.155 $

* * * T / W (Table / Width): * * $0.694 $

* * * U / W (Crown Width / Width): * * $0.601 $

* * * P / W (Pavilion Depth / Width): * * $0.517 $

* * * C / W (Crown Height / Width): * * $0.117 $

* * * Vol. / W ☆ (Volume): * * $0.279 $

# # # Uncut Step Sequence (Cutting Sequence)

* * 1.Lower part or jewel bottom (Pavilion) * *

Acting as a prism reflecting light back into the observer's eye, it consists of 33 squares, as follows:

* * * A (12 square): * * Cut at corner $43.00 ^

* * * B (3 square): * * Cut at corner $90.00 ^

* * * C (3 square): * * Cut at corner $90.00 ^

* * * D (3 Square): * * Cut at $70.00 Corner ^

* * * E (12 square): * * Cut at corner $40.00 ^

* * 2.Upper part or top house (Crown) * *

It serves to receive light, refract light, and create a glitter. It consists of 19 squares, as follows:

* * * 1 (3 square): * * Cut at corner $38.00 ^

* * * 2 (3 square): * * Cut at corner $38.00 ^

* * * 3 (3 Square): * * Cut at $30.00 Corner ^

* * * 4 (3 Square): * * Cut at $30.00 Corner ^

* * * 5 (3 square): * * Cut at corner $10.00 ^

* * * 6 (3 square): * * Cut at corner $10.00 ^

* * * Table (1 square): * * Cut at corner $0.00 ^

# # # In-depth Analysis in Mineralogy and Gemological Sciences

TRINO design focuses on creating holistically symmetrical proportions. Mineral clarity will drive accentuating contrast and accuracy of intersecting angle squares.

* * Material application precautions: * *

This cut is set critical angle for ore with a refractive index value of $R.I. = 1.580 $. If there is a wish to apply this to other types of mineral cut with a different R.I. value, it is absolutely necessary for the uncut.

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11 Mar 2026 |# Cut the jewels # TRINO # Jewel # Faceting # Machinery