Jong Collection

# # March Birthstones: Aquamarine and Bloodstone

Birthstones have been symbols with a long history since ancient times, linking crystals to beliefs, energy, and life enhancement. For those born in March, there are two prominent birthstones distinguished by both their mineralogical properties and historical value: **Aquamarine** and **Bloodstone**.

# # # Historical Background of Birthstone Crystals

The concept of birthstones originates from ancient times, where twelve types of gemstones were adorned on the garments of spiritual leaders, representing the twelve tribes. Over time, scholars between the 1st and 5th centuries integrated this concept with astrological principles, establishing the tradition of wearing birthstones to attract positive energy and balance into one's life.

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# # # Aquamarine: The Gemstone of the Sea

In the field of **mineralogy**, Aquamarine is a variety of **Beryl**. It belongs to the **hexagonal** crystal system with a chemical composition of Beryllium Aluminium Silicate, represented by the formula $Be_3Al_2Si6O_{18}$. Its hardness on the **Mohs scale** ranges from 7.5 to 8, indicating high durability. It has a specific gravity of 2.67–2.75 and a refractive index of approximately 1.567–1.590.

The name "Aquamarine" is derived from Latin, meaning "seawater." Its iconic blue to blue-green color is caused by iron impurities within its natural crystal structure. It is primarily found in **pegmatite** veins and granite, with major deposits in Brazil, Madagascar, and various African nations. Currently, heat treatment at temperatures of 400–450°C is commonly used to enhance and stabilize its bright blue hue. Additionally, some specimens may exhibit chatoyancy (cat's eye) or asterism (star effect) in nature.

**Beliefs and Uses of Aquamarine**
Ancient mariners used Aquamarine as a protective crystal to guard against the dangers of travel and to alleviate seasickness. In the Middle Ages, it was fashioned into crystal balls for divination. Today, people favor Aquamarine as a crystal that helps balance emotions, reduce anxiety, create mental peace, and enhance communication skills with greater clarity and courage.

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# # # Bloodstone: The Crystal of Strength

Bloodstone, scientifically known as **Heliotrope**, is classified in mineralogy as a cryptocrystalline variety of **Quartz** called **Chalcedony**, with the chemical formula $SiO_2$. It has a hardness of 6.5–7. Its distinguishing feature is a dark green opaque base caused by inclusions of **Chlorite** or **Amphibole**, interspersed with red spots resulting from iron oxide, **Hematite**, or **Jasper**.

The formation of Bloodstone typically occurs in low-temperature and low-pressure environments near the Earth's surface or in areas with hydrothermal circulation. Major sources include India, Australia, Brazil, and the United States. It is usually cut en cabochon to highlight its unique patterns.

**Beliefs and Uses of Bloodstone**
In the past, warriors carried Bloodstone as a crystal to bolster courage and believed it possessed the power to balance the body. Nowadays, Bloodstone is used to stimulate life force energy, increase physical endurance, and support the efficiency of the circulatory system. It serves as a symbol of new beginnings and overcoming all obstacles.

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# # # Conclusion

Aquamarine and Bloodstone are March birthstones that reflect different yet balanced polarities of energy. Aquamarine offers cool tranquility and emotional cleansing, while Bloodstone provides strength and protection. Collecting these two types of **minerals** allows one not only to appreciate natural beauty but also to deeply study the geological phenomena hidden within their crystal structures.

> **Note:** Information regarding **Crystal Healing** is a matter of personal belief and a guideline for energy balancing; it is not based on scientific data or modern medical practices.

# # **Gemstones Beyond Imagination: A Deep Dive into the 3 Rarest Optical Phenomena in the World**

The world of gemstones is not merely about the brilliance of faceted cuts or vivid hues. There is a hidden wonder within, which gemologists and high-end collectors revere as the pinnacle of desire: **Optical Phenomena**.

Optical phenomena in gemstones are not common occurrences. They are the result of an extremely complex and specific interaction between light and a crystal's internal structure or inclusions, crafted by nature over millions of years. This interaction gives a gemstone a unique identity—whether it be the formation of a star, a cat’s eye-like chatoyancy, or a rainbow play-of-color.

Among these, three specific phenomena are considered the rarest, most complex, and most valuable in the realms of gemology and collecting. This article explores the mysteries and the aesthetic criteria for these extraordinary treasures.

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# # # **1. Tenebrescence: The Living Gemstone and Reversible Color Change**

While most are familiar with gemstones that change color based on light sources, there is a phenomenon that transcends this: a color change triggered by energy from ultraviolet (UV) radiation or sunlight, which then returns to its original state in the dark. This is known as **Tenebrescence**, or scientifically, **Reversible Photochromism**.

**Mechanism and Wonder:**
The primary representative of this phenomenon is **Hackmanite**, a sulfur-rich variety of the Sodalite mineral group. The magic occurs at the atomic level. When Hackmanite is exposed to UV rays, sulfur atoms within the structure absorb energy and temporarily change states (creating "Color Centers"), causing the gemstone's color to deepen significantly—for example, shifting from pale violet to deep purple or from faint pink to a vivid pink-red. Once moved to a dark environment or stored in a box, the stored energy is released, the atomic structure returns to its normal state, and the color fades back to the original.

**Rarity and Collectibility:**
Gem-quality Hackmanite that displays a distinct tenebrescent effect is exceptionally rare. Significant sources include Afghanistan, Myanmar, and Canada. Its rarity stems from the precise chemical composition required for this reaction to occur.

**Quality and Aesthetic Indicators:**

* **Speed of Change:** Crystals that darken immediately upon sun exposure and return to their original state quickly are considered high quality.
* **Intensity of Shift:** The greater the contrast between the "dark state" and the "sun-exposed state," the higher the value.
* **Reversibility Durability:** The gemstone must be able to shift colors back and forth repeatedly without a loss in performance.

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# # # **2. 12-Rayed Star: A Perfect Universal Coincidence in Corundum**

Standard star gemstones, such as the Star Sapphire, typically exhibit a 6-rayed star. This is caused by a single type of needle-like inclusion (usually Rutile) oriented in three directions. However, a **12-Rayed Star** requires a much more complex geological coincidence.

**Mechanism and Wonder:**
A 12-rayed star is not produced by one type of inclusion, but rather the coexistence of two different types of needle-like inclusions within the same stone:

1. **Rutile Needles:** Create the first 6-rayed star set.
2. **Hematite or Ilmenite Needles:** Create the second 6-rayed star set.

The wonder lies in the fact that these two sets of inclusions must grow and align in specific directions, typically oriented 30 degrees apart. When cut into a **Cabochon**, the light reflecting from both sets appears as two 6-rayed stars superimposed, resulting in a perfect 12-rayed star.

**Rarity and Collectibility:**
This is one of the rarest phenomena in the Corundum family. Thailand is world-renowned for these, particularly from the Bang Kacha source in Chanthaburi and Bo Phloi in Kanchanaburi, where "Golden Star Sapphires" or "Black Star Sapphires" with 12 rays are occasionally found.

**Quality and Aesthetic Indicators:**

* **Ray Sharpness:** All 12 rays must be sharp, continuous, and equally bright.
* **Centering:** The intersection of the star should be perfectly centered on the stone.
* **Movement:** When moved under a light source, the star should glide gracefully and vividly across the surface.
* **Body Quality:** The body of the crystal should be smooth and consistent, providing a clear contrast between the background and the rays.

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# # # **3. Fine Color Change Sapphire: The Ultimate Mood Shifter**

While Alexandrite is the most famous color-change gemstone, a **Sapphire** that can change color with high-quality saturation is arguably rarer in terms of volume and is highly sought after by serious collectors.

**Mechanism and Wonder:**
This phenomenon is caused by "Trace Elements"—certain transition metals like **Chromium**, **Vanadium**, and sometimes **Iron**—which infiltrate the crystal structure in very specific proportions. These elements cause the gemstone to absorb light intensely in the yellow-orange spectrum.

As a result, under daylight (which is rich in blue light), the sapphire appears blue or violet-blue. However, under incandescent or candlelight (which is rich in red light), the sapphire allows red light to pass through most effectively, making it appear reddish-purple or purplish-pink.

**Rarity and Collectibility:**
Most sapphires have a fixed color. Finding one with the perfect balance of trace elements to trigger a distinct color change is a rare feat of nature. They are typically found in premium sources like Sri Lanka, Madagascar, and Tanzania.

**Quality and Aesthetic Indicators:**

* **Degree of Change:** This is the most critical factor. A sapphire with a 100% distinct change (e.g., from deep blue to ruby red) holds the highest value.
* **Attractiveness of Both Colors:** The colors in both daylight and artificial light must be vibrant and saturated, not dull, dark, or overly gray.
* **Clarity and Brilliance:** Like all fine gems, clarity and a cut that enhances brilliance will further emphasize the color-change phenomenon.

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**Summary**

Owning a gemstone with these rare optical phenomena is not just about possessing a beautiful piece of jewelry; it is akin to holding a scientific and geological record meticulously crafted by nature. The complexity and the infinitesimal chance of their formation make these crystals more than just minerals—they are timeless works of art from the Earth.