Pleochroism - The color of some gems changes

Pleochroism

The color of some gems changes with the angle at which you look. Diachronic when it comes to these gems have two colors in two directions located at 90 degrees from each other and when trichroisme have three colors in three directions, also located at 90 degrees from each other. The intensity of the pleochroism of a gem is different to the other; it can be high, medium, or low.

Pleochroism stone

Blue
Aquamarine (medium)	colorless-light blue / light blue-dark blu
Alexandrite (strong)	rouge- purple /orange /vert dark
Apatite (strong)	bleu-jaune /bleu-incolore
Benitoïte (strong)	Clear / Dark Blue
Iolite (strong)	Clear / yellow / blue / dark blue-violet
Sapphire (strong)	violet-dark blue / green-light blue
Topaz (very low)	colorless / pale blue / pink
Tourmaline (strong)	dark blue / light blue
Zoisite (strong)	blue / red purple / yellow green
Zircon (strong)	blue / clear / gray

         

Green
Alexandrite (strong)	dark red / orange / green
Andalusite (strong)	dark green / dark red
Emerald (strong)	Green / Blue Green
Peridot (low)	yellow-green / green / colorless
Sapphire (strong)	green / yellow green
Sphene (medium)	dark green / blue green
Tourmaline (strong)
Zircon (low)

                 

Yellow
Citrine (very low)	pale yellow / pale yellow
Chrysoberyl (very low)	rouge-jaune/jaune-vert/vert
Danburite (low)	very pale yellow / pale yellow
Orthoclase (low)	pale yellow / pale yellow
Phénakite (medium)	Clear yellow / orange
Sapphire (low)	yellow / pale yellow
Spodumene (medium)	pale yellow / pale yellow
Topaz (medium)	yellow-brown / yellow / yellow orange
Tourmaline (medium)	pale yellow / dark yellow
Zircon (low)	yellow-brown / yellow

  

Red and pink
Alexandrite (strong) -	dark red / orange / green
Andalusite (strong)	dark red / brown red
Morganite (medium)	pale red / red violet
Ruby (strong)	violet red / orange red
Tourmaline (strong)	dark red / light red
Zircon (medium)	purple / red brown

  

Purple and Violet
Amethyst (very low)	purple / purple
Andalusite (strong)	green brown / dark red / purple
Beryl (medium)	purple / colorless
Corundum (high)	purple / orange
Spodumene (Kunzite) (strong)	Purple / Purple / Clear / Pink
Tourmaline (strong)	pale purple / purple

           

Brown and Orange
Quartz (low	brown / reddish brown
Sapphire (strong)	yellow-brown / orange
Topaz (medium)	brun-jaune/brun-jaune dull
Tourmaline (very low)	dark brown / light brown
Zircon (very low)	brun-rouge/brun-jaune

 

Birthstones - correspondence between the birthstones and months

Birthstones

This table will show the correspondence between the birthstones and months:

  

Month of Birth	Modern Birthstone	Traditional Birthstones	Mystical birthstones	Ayurveda
January	garnet	garnet	Emerald	garnet
February	amethyst	amethyst	bloodstone	amethyst
March	Aquamarine	bloodstone	jade	bloodstone
April	diamond	diamond	opal	diamond
May	Emerald	Emerald	sapphire	agate
June	Perle, Moonstone	alexandrite	Moonstone	pearl
July	ruby	ruby	ruby	ruby
August	Peridot	sardonyx	diamond	sapphire
September	sapphire	sapphire	agate	Moonstone
October	Opal, Tourmaline	tourmaline	jasper	opal
November	Yellow Topaz, Citrine	citrine	pearl	topaz
December	Blue Topaz, Turquoise	Zircon, Turquoise, Lapis Lazuli	onyx	ruby

  

The list of birthstones modern lists of birthstones official U.S. National Association of Jewelers, jewelers in the United States. These gemstones were officially adopted in 1912. In the United States is the recognized list.

The list of birthstones traditional contains older birthstones and is sometimes combined with the list of modern birthstones. These stones reflect social traditions of birthstones, which date from the fifteenth century. (Many jewelers have lists of traditional birthstones different).

The list of mystical birthstones is of Tibetan origin and dates back more than a thousand years.

The list of birthstones is from Ayurvedic Indian medicine Ayurveda - a type of medicine used for over a thousand years.

VARIATION ON MODELS AND RADIANT MADE

This model is inspired by two famous designs: the "Radiant" (crown) of

Henry Gross bard and "formed" (flag) by Robert Strickland. It

Have 75 facets (pavilion: 42 rings: 24 leaves: Table 8: 1)

And brightness is 78.2% of quartz.

  

Description

Refractive index:                       1.54

Index:                                       96

Facets:                                     75 (P = 24 C = 42 F = 16 T = 1)

Brightness:                                78.5%

Volume:                                    0677

Length / Width:                         1.48

Height crown                            0275

Pavilion Height:                         0704

Height / width:              0957

Table / width:                            0690

Instructions

Pavilion

A  90.00                      48-96 Determine the width

B  90.00                      24-72 Determine the length

C  90.00                      12-36-60-84 Coins

1    41.00                     19-29-67-77Form a temporary culet

2   53.19                      24-72 Location girdle

3   46.14                      12-36-60-84 Location of girdle

4   67.12                      96-48 Location girdle

5   54.25                      02-46-50-94 Meet A, C, 3 and 4

6   44.54                      07-41-55-89 Meet A, C, 3, 4 and 5

7   47.66                      23-25-71-73 Meet C, B, 1, 2 and 3

8   41.78                      20-28-68-76 Meet C, B, 1, 2, 3 and 7

9   41.15                      09-39-57-87 Meet 1, 3 and 6

10 43.29                      01-47-49-95 9 Meet the culet

11 46.95                      03-45-51-93 Adjust the angle if necessary

12 43.94                      24-72 Meet 1 and 8 + 2 and 7

Crown

1  55.24                       48-96 Determine the height of the girdle

2  55.24                       12-36-60-84 ---- Determine the height of the girdle

3  55.24                       24-72 - Determine the height of the girdle

4 41.50                        24-72 - Determine the location of the staircase

5 29.86                        12-36-60-84 ---- Determine the location of the staircase

6 42.00                        48-96 - Determine the location of the staircase

7 29.36                        02-46-50-94 Meets 1, 2, 5 and 6

8 28.41                        20-28-68-76 Meet 2, 3, 4 and 5

Table 0.00                    T

PEAR

Description

Refractive index:                       1.54

Index:                                       96

Facets:                                     65 (P = 28 C = 22 F = 14 T = 1)

Brightness:                                78.5%

Volume:                                    0265

Length / Width:                         1.27

Height crown                            0290

Pavilion Height:                         .680

Height / width:                           0672

Table / width:                            0504

Instructions

Pavilion

A  90.00                      02-94 A and G determine the length

G  90.00                      41-55   A and G determine the length

C   90.00                     17-79 C and D determine the width

D  90.00                      28-68   C and D determine the width

B   90.00                      08-88 the length of the segment B is equal to the segment A

E   90.00                      34-62 segments E and F are of equal length

F   90.00                      38-58 segments E and F are of equal length

1   46.22                      02-94 Determine the location of the girdle

2   42.72                      08-88 Determine the location of the girdle

3   43.02                      17-79 Determine the location of the girdle

4   42.11                      28-68 Determine the location of the girdle

5   42.62                      34-62 Determine the location of the girdle

6   44.92                      38-58 Determine the location of the girdle

7  44.52                       41-55 Determine the location of the girdle

8  44.52                       01-95 Meet in a girdle

9   40.50                      09-87 Meet at 2 and 3 girdle

10 40.60                      33-63 Meet the girdle 4 and 5

11 43.52                      39-57   6 and 7 to meet girdle

Crown

1 54.25                        02-94 Determine the height of the girdle

2 49.72                         08-88 Determine the height of the girdle

42.63   3                      17-79 Determine the height of the girdle

4 38.54                        28-68 Determine the height of the girdle

5 40.11                        34-62 Determine the height of the girdle

6   42.23                      38-58 Determine the height of the girdle

7   43.46                      41-55 Determine the height of the girdle

8   42.69                      05-91 Meet 1 and 2 in girdle

9   32.00                      22-74 Meet 3 and 4 in girdle

10 36.99                      36-60 Meet 5 and 6 in girdle

11 31.75                      487 meeting in girdle

12 24.41                      96 Encounter 1 and 8

13 20.10                      12-84 2-3-8-9 Meet

14 21.12                      31-65Meet 4-5-9-10

15 19.68                      42-54 Meet 6-7-10-11

T 00.00 Table meeting 8-9-10-11

TRIANGLE CUSHION (CHANGE)

This triangle cushion is inspired by a design created by Robert Long and Norman Steele.

We kept the crown intact but have changed the facets of the pavilion to

Reduce the depth and increase its brightness significantly. It has

70 facets (27 on the crown and 30 on the pavilion) and its brightness is 87.9%

Description

Refractive index:                       1.76

Index:                                       96

Facets:                                     70 (P = 27 C = 30 F = 12 T = 1)

Brightness:                                87.9%

Volume:                                    0171

Length / Width:                        1.00

Height crown                            0236

Pavilion Height:                         0726

Height / width:                          0530

Table / width:                            0570

Instructions

Pavilion

A 90.00 ----- ----- ------- 06-26-38-58-70-90 Determine the format

B ----- 90.00 ----- ------- 02-30-34-62-66-94 determines the format

42.77 ----- 1 ----- 01-31-33-63-65-95 ------- 4 Meet the girdle

2 39.59 ----- ----- ------- 07-25-39-57-71-89 3 Meet the girdle

42.47 ----- ----- 3 ------- 06-26-38-58-70-90 Determine the location of the girdle

4 02-30-34-62-66-94 ------- ----- ----- 44.37 Determine the location of the girdle

5 39.00 ----- ----- 04-28-36-60-68-92 ------- 1-2-3-4 Meet

Crown

1 ----- 32.69 ----- ------- 06-26-38-58-70-90 Determine the height of the girdle

2 42.60 ----- ----- ------- 02-30-34-62-66-94 Determine the height of the girdle

34.72 ----- ----- 3 ------- 04-28-36-60-68-92 Meet 1 and 2 in girdle

4 ----- 21.32 ----- 96-32-64 -------------------- Meet 2 and 3

5 15.70 ----- ----- ------- 08-24-40-56-72-88 Meet 1 and 3

T ----- 00.00 ----- 96 ---------- ---------------- Meet 2 and 3